I didn't find any major problems with the other maps so I'm going to skip them and focus solely on the Inner Oni for you, and let other modders worry about the easier maps.
[Inner Oni]
Let me start by saying I'm sorry. I'm going to forwardly apologize for any misgivings or miscommunication in regards to explaining things. You need to understand that, while everyone else simply says "redo your map", it may sound rude but they are not wrong. I am going to slowly introduce you to something called "Music Theory". It's a simple way of saying "this is what sounds good to 95% of people when they listen to it", or that "this" group of people adore this song over another. It's an idea started waaaay back when and as continued to grow for many many generations. I would, on your own time, do some googling and research as much about the history and the theories themselves as you can. This will give you a far greater appreciation for your own maps, how they sound, how modders grade your maps, and music in general. I'm going to bring to your attention things that need to be worked on, things you can alter, options you can utilize in the same pieces, and so forth. Read with an open mind, and remember it's all just a theory. (Albeit, a very popular and widely appreciated one.)
Firstly, your map is ridiculously overmapped in my opinion. Which means you have to many notes for not enough song. I will mention places you can (or should) tone it down to make the map fit more snug with the song.
00:10:377 - Every single stream you have up to here. Remove them. I hate to break it to you, but they have no purpose and don't set any extra mood, they don't warm up the player. They are useless. The only exception is at 00:07:634 - and 00:10:377 - because they do have merit.
The entire section between 00:11:063 - and 00:16:549 - you need to find some way to have what I call a ground beat. This means find a simple pattern to have as your under-tone or your actual drum beat, then fill in the blanks with stream/extras. A good way to do this is to decide "okay, I want to have kats be the main focus for this section", or dons be the focus. Then find a simplistic drum beat you can use to follow your choice. Look up on youtube for some drum beats if you want to get an idea of what you can do. Listen for hi-hats and symbols to make Kats and drums and base beats for Dons. I see you have a decent start to this section, so you may not need to do (below mentioned), but it may help if you need it.
Once you have an idea of what you want to do, erase your entire piece. Yup, all of it. I've noticed the best way to make a section sound and feel smooth when it doesn't and you simply can't find a way to fix it, is start from scratch. It's time consuming, but 99% of the time it works. Then lay out the simple layer of beat(s) you want, as if this was a kantan or an easier map. Then put in your filler around that. Do your best to keep your stream lengths consistent and that there is no overlapping and awkward positions.
00:16:892 - to 00:19:292 - I see what you are going for, and I would say keep it consistent pattern-wise. Make them both kkkkddddk. Then as for 00:19:292 - to 00:21:520 - I also see you are keeping consistency good, but it's overlaps too much. Give a break at 00:19:377 for players to catch on and feel the new beat instead of just forcing it on them. I'm trying to say your transition from one layer to the next is very awkward. Not that the patterns or the beat is bad, but the transition is bad.
00:24:863 - I would rework this piece and keep it similar to the previous part at 00:22:034 - . Consistency will win you many fans in parts where you are overmapping. Remember, overmapping is not a bad thing, but must be done carefullly.
00:26:149 - I would use more kats for the higher frequency changes in this piece. Keep it simple, but keep it sporadic.
00:27:606 (245,246,247) - Remove these, they are unnecessary.
00:28:720 - Missed a note here entirely.
00:30:092 - Same ^.
00:30:263 - to 00:30:949 - make this the same as at 00:28:892 - while leaving some break for the player at 00:31:034 - before picking the stream back up at 00:31:634 - .
!NOTE! You do not necessarily have to leave a 1/2 beat break. short 3-plet 1/4th breaks are okay in an inner/oni map. Just make sure the transition (we talked about that a bit) is smooth still.
00:32:320 - Could make this a bit more complicated with kddkddk or something of the like. Listen to the symbols in the music to give you a good judge to base your beat on.
00:35:406 - Careful not to leave unmapped notes in an overmapped map like this.
00:38:149 - ^
00:38:663 - If you're trying to smooth out the difficulty here, best to keep them fingers warm. I'd highly recommend adding a note here.
00:39:177 - Here
00:39:520 - And here.
00:40:892 - Forgot one.
00:41:577 - Change to Kat.
00:41:920 - No finisher here.
00:42:263 - Change to Kat.
00:42:606 - I recommend altering this to bring it slowly to a big stream instead of just throwing one out there. Build it up to a stream at 00:43:292 - by using ddk ddk type patterns. Simple 3-plet 1/4ths will do here better.
00:46:720 - Same as above. Just to keep consistency.
From 00:49:463 - to 00:52:549 - or even as late as 00:53:577 - I hear a lot of 2-plet 1/4th patterns in the background of the music you could be throwing in. Spice it up before you get to your long streams again.
00:53:577 - To be honest, I could spend all night working on these long streams in this section with you, but I'd rather leave that up to you (and the BATs) on what to do here. It's your map, do what you want. Just remember what I've talked about before in the very beginning of this mod. Make sure you keep consistent beat-types and change where appropriate (ie: every 4th repetition of beat, change your beat). There is a milliion and one ways to make something like this work. That's the beauty of music theory. And you will probably always get yelled at for this, but so long as you take everyone's advice (with a grain of salt) and tweak it where YOU feel it's necessary, you'll do fine. Remember, if it doesn't sound or feel right, it isn't. Transitions are just as important as the overlaying sound and beat, and I think you did quite well for the transitions here. I will mark/mention areas of improvement for your sake though.
00:59:063 - and 00:59:234 - Change to Kats for sound?
01:05:234 (560,561,562,563,564,565,566,567,568,569,570) - This piece could be transitioned much better. To simplify, look at where your kats are placed. At first they are mostly all on white spaces (1/2 beats). You switch them to a 1/4th beat placement (red spaces) which is fine, but your method could use some work. Look at your ddd plet towards the beginning. 3-plet streams are fine to do like this, but they usually go better with another 3-plet. Or even change this piece to do a kddkddk type swap for your beat. I will show some examples:
kdddkkkdddk
kdddkdkdkdk
kddkddkkddk
Would fit much smoother in this section than pattern-at-present. Try some out and see for yourself.
01:11:749 (634,635,636,637,638,639,640,641,642) - Another transition that does not work. Shy away from using odd-numbered plets in long sets like this, to create your transition. (Nobody wants to play another Shinsekai.)
01:16:891 - Personally I dislike breaks in inner oni unless completely called for, I might use a spinner or some sparse don/kat notes here. Up to you though.
02:01:463 - Unnecessary finisher.
02:03:606 (266,267,268) - This is where you bad transitions exists in this stream, I feel.
02:08:320 - This stream has many bad transitions. Look to what I said earlier and see what you can do here. I'll leave it up to you.
02:14:491 - Also look at this stream for more bad transitions.
02:23:063 - I don't like the transition here, but honestly it plays fine for me. I would check it out/get a second opinion on it anyway.
The rest is up to you, my friend. Work on transitions and consistency and beat-layers and you'll be good to go.
