Normal
00:06:474 (5,6) - I suggest you avoid stacking here in Normal, and the music didn't seem so strongly inclined for stacking
00:40:013 (1) - this off-beat is very unexpected in the Normal, especially with the strong vocals at 00:39:844
00:45:406 (1) - ^
01:22:822 (1,2) - blanket nicely
02:35:631 (1,2,3) - this rhythm is really complex in for such a difficulty, with 02:36:305 (2) being on an off-beat and also not on any of the vocals, making it very obscure as it goes with 1 of the background sounds, for the lowest difficulty, this is difficult
03:31:754 (4) - NC instead of 03:32:429 (1)
As the lowest difficulty, this is not very easy at all. You used a lot of off-beats in the map, especialy at the start and at the verses. For a 1/4 song this is too complex to be the simplest difficulty, either the rhythm in this difficulty is simplified or there is an Easy with more regular beats
Combo isn't consistent either, especially in the chorus/kiai. Just look at 02:21:642 (1,2,3,1,2,1,2,3) - and 01:08:833 (1,2,3,1,2,1,2,3) - and 03:31:754 (4,1,2,3,1,2,3) for comparison. Inconsistency makes it look more random.
Hard
The jump from Normal to Hard is quite large, with the introduction of the map being almost mostly 1/2 in the Hard already, you might have to find ways to reduce the gap. Also I think you should have HP5 instead for more gradual increase
00:45:575 (2,3) - you can make 00:45:575 (2) more centred between the slider
01:52:990 (2,3) - blanket them better?
01:55:687 (4,5) - ^
01:55:687 (4,6) - stack the ends perfectly
02:07:485 (7,8) - you NC this instead of 02:08:159 (1) before the first kiai time at 00:54:676 (1,2) - why is it different here?
02:21:137 (1,2) - this is inconsistent new combo with 1st kiai time, at 01:08:328 (3,4)
02:24:507 (1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,1,2,3,4,5,6,7,8) - you split this into much smaller combo patterns in the earlier kiai time at 01:13:215 (1,2,3,4,5,1,2,3,4,1,2,3,1,2,3,4,1,2,3,4) - why is this different as well
03:31:249 (7,8) - differs from 2nd kiai as well
Major combo pattern inconsistencies, once again it's about structure, and this makes it look random. Honestly, unless there is logical reasoning in the song, I cannot see why it won't be the same, being the same rhythm, same tune
Insane
00:16:670 (1,1) - 00:17:429 (1) is too soon after the spinner, talked about it with a BAT. This is what he listed as suggestions:
- map the spinner out, it seems just like a gimmick anyway
or
- extend the spinner to where the circle begins so that it will cover the vocals you are going for and provide an end to th rhythm while also allowing enough time for the slider + the leniency
00:46:417 (4,1) - ends aren't stacked perfectly
01:49:114 (1,2,3,4,5,6,7) - inconsistent with the verse earlier on at 00:35:799 (1,2,3,4,5,6,1,2,3,4) - with matching tune
02:26:024 (1,2,3,4,1,2,3,4) - ^ with 01:13:215 (1,2,3,4,5,6)
02:47:681 (1) - same as 00:16:670 (1,1)
03:35:968 (1,2,3,4,5,6,7,8,9) - differs from 02:26:024 (1,2,3,4,1,2,3,4)
You might feel Combo patterns aren't really that crucial but it plays an important part in sectioning and presentation, and consistent patterns for fixed parts is imprtant in showing the organisation of the map
Insane has many streams and slider stream jumps, but it's inevitable, being the hardest difficulty. It also has many jumps, and big jumps for that matter. The issue comes as it jumps up in difficulty once again from Hard, which has just a few jumps, and not very big ones either. In order to at least bridge some of that gap, you would have to increase the jumps in Hard, and have it more frequently, seeing that triplets and streams isn't a thing in Hard. But then there already is an issue with difficulty between Normal and Hard, which prevents from making Hard any more difficult. You either have to have a difficulty to bridge between them (Hard - Insane) or you really adjust all the difficulties to ease the gap. I still feel the need of the Easy for the welfare of newer players, with such an odd off-beat Normal. It's not that the rhythm in Normal is not right, it is just more complex than it should be as the lowest difficulty.
Good Luck