[General]
This needs an Easy to be ranked...
Delete the .osb and re-full-submit.
I recommend adding a pure black storyboard element in the background that fades out once the video starts; that way, the video looks more natural, and no-video users can still see the BG.
Make sure kiai starts on the beat; if you change audio with kiai, put it in 2 different timing sections; an earlier one for audio and the right timing for kiai. Kiai use did feel a bit messy though.
Slider velocities felt kinda low in general.
[Normal]
Doesn't really need lead-in.
Ehh, still same concerns about readability.
00:34:557 (3,4,5) - Spacing.
I also found consistency to be an issue; you occasionally play the 1/4 (e.g. 00:35:335 (5,6)), occasionally skip it (e.g. 00:39:113 (3,4)), and occasionally just replace it with 1/2 (e.g. 00:43:113 (5)). This might contribute to the feel of unreadability; if it was consistent, you screw up once and not again.
In general, I felt that many of the notes landing on 1/4 would be better replaced by sliders (e.g. 01:13:779 (1,2,3) can become a slider with a repeat), which are much friendlier on timing.
01:18:668 (3) - Weird shape, lol.
I'd recommend remapping this difficulty; possibly with bigger circles too, but the main thing is to play more intuitively. If you can get it into an intuitive map in the 3-4 star range, it'll probably suffice as the easiest difficulty.
[Hard]
Doesn't really need a lead-in either.
00:08:002 (1) - Same thing as what strager said about Insane; it's pretty weird to hit the first note of a phrase, then ease into a break for that phrase, and immediately pick up again.
00:11:335 (4) - Could be snapped neater with 0.0x distance snap and no grid snap.
00:14:002 (3,1,2,3) - Doesn't fit very well, in my opinion.
00:25:668 (5,6) - The fact that this bends back disturbs me a bit.
00:27:446 (3,4) - I'd recommend not putting this under the slider end; the timing is a bit hard to predict.
00:32:335 (2) - The hitburst of 9 covers this slider up.
00:49:113 (6) - Music is doing something totally different from this slider.
00:58:001 (1,2,3,4,5,6,7) - Same thing about unpredictable rhythms not placed in stacks.
01:18:668 (3) - lol weird slider again.
[Naruti]
Turn stacking down a bit; some of your formations are going out of shape.
00:08:113 (1) - Doesn't fit well, imo.
00:36:392 - Two stacked timing sections; please remove one.
01:24:668 (1,2,3) - Why is this differently spaced?
There're 6 spinners in this 1.5 minute map, 5 of which are at the bare minimum for spinner length, and 4 of which have a note 1/4 before and 1/2 after it.. That's not very playable, or at least, not very enjoyably playable. I spin at 400 and still couldn't 300 more than half of them.
[Insane]
00:17:779 (1) - Please don't. Puppies are crying at these 2x sections.
00:34:890 (6,7,8) - Inconsistent spacing; watch out for the 0.5x BPM section borking spacing.
00:39:668 (8) - A bit closer to 7?
01:12:224 (1,2,3,4,5) - Ehh, didn't like this. I guess it's okay though.
01:13:779 (1,1,1) - Make the jump spacing consistent?
01:17:335 (2,3,4,5,6,7) - Remove 3 and 6?
01:18:668 (1) - Start this 1/2 later, and put a note where it once started.
Well, most of that was probably opinion; the maps just don't flow very well, I guess is the biggest issue.