I'd intended to just do a couple of test plays and put some thoughts of a few things that needed tweaking. But... yeah it didn't work out that way, and this turned into a bit of a rant. Sorry if it comes across as a little rude at times.
So anyway... Basic Drum:
Keys: 1 2 3 4 5 6 7
There's too much reliance on 1/7 presses switching with 4 presses, so there isn't really a feeling of balance to it. If you got rid of every single one of the 1/7 presses it would make the map feel better to play (although there are a couple of these across the entire beatmap that are entirely appropriate and should NOT be changed - both of which are indicated below).
This map has far too little variety in it. Until about 2:30 pretty much the entire map follows one of just 3 patterns - usually EXACTLY the same. This excessive repitition is both lazy and boring. Use similar themes, sure, but change them. For example, the 1/3 and 6 theme could be 1/3 and 5, 1/3 and 6, 1/3 and 7, 2/4 and 6 or 2/4 and 7 (note that this last one is harder to play than the others). Or it could even be 3/5 going out to 1 and/or 7.
Here's some places where the map could/should be improved:
00:22:949 make this 1/5 and the next one 3/7? The next note could then be 2/6, filling in the gap - at present the 6th column isn't pressed for 7.5 seconds (or 30 things in a row) there. It also feels a lot more natural to play.
Speaking of gaps, column 5 isn't pressed between 28 and 40 seconds. I feel a good rule of thumb is that every key should be pressed at least once every (number of keys*2) key presses in sections without long holds, unless you have a good pattern going which can't involve that key, in which case it should be pressed as close as possible to either side of this pattern.
00:32:368 and 00:33:065 why are these the same notes? They're nothing like each other
00:42:135 - why the double press here?
00:47:193 - change this. I don't care how, just do it. should it be a double press? Probably not. Should it be 1/7? Definitely not. Should it have the same key in it as the following note? Absolutely not.
00:58:182 - nice pattern, but is it really right. I would change this, in such a way as to lead into the below:
00:59:228 ->
http://osu.ppy.sh/ss/1302547 would be a better way of doing this, and the end bit still feels like it's leading into the next pattern, while also following on from the one shown. Can probably be done better - this is just a 1 minute's work example.
01:10:391 - needs changing, preferably by getting rid of the 1/7
01:18:763 - move this and the following note one to the left
01:33:065 - for once it isn't the 1/7 that needs changing (for the first time, this actually feels right), but the note afterwards. This shouldn't be on the same note as the previous double. Perhaps move to 4 and then put the following note that is on 4 onto 1 instead.
01:49:461 Why is it the a double? Doesn't make sense, unless you are doing it because of the tone change, in which case why don't you double te previous ones?
02:05:504 to 02:11:026 - it might just be a personal preference, but I really don't feel that extended periods of symmetrical patterns (ie. where every note is 1/7, 2/6, 3/5 or 4) work well. And this section could be nicely used as an exhibit of this awkwardness. I'd redo this entire section, but, like I said, it might just be my personal preference talking here. Personal preference or not, though, there's way too much yellow (ie. presses of 4) on my screen towards the end of this bit.
02:12:830 and 02:13:527 - perhaps make these ones 4/6 rather than 5/7? That would mean you would need to move the next note but that really isn't a problem because...
02:13:876-02:16:667 is another of those symmetrical sections. It makes it feel like you wanted to make a 4k map but liked the idea of the 1/3, 6 style pattern (which are effective if overused) so turned it into a 7k instead, and adopted the simplest approach to doing so.
02:17:016 - variety is the spice of life. Perhaps make this and the next one 2/4 rather than 1/3?
02:22:248 - this feels unusually good for a symmetry section. I'd still rather it wasn't, but isn't too bad... except...
02:25:039 - perhaps 1/4 for the first pair, 2/5 for the second etc.? Up to you. Gives it a feeling of progress rather than 'oh let's do that pair now'.
02:38:469 - make 2/6
03:00:097 - make 2/6 then 3/5 and the next pair 3/5 then 2/6
03:01:318 - wow we've found another time where 1/7 is used well!
03:15:272 - why do the double and single switch around briefly here? make this a double and the following note a single.
Haven't even checked the other difficulties, but that's quite enough for now I think.
