[General]
before 00:45:453 - I would suggest using a slightly lower volume since 45% sounds a bit too loud, consider using 35~40%.
[Oni]
Is HP7 really necessary? for 860 objects this looks quite brutal imo, nerf it down to 5. Additionally, you could buff the OD, having Oni and Muzukashii the same OD is silly.
00:08:657 (15) - the tone at this note isn't high and differen to the case of 00:03:845 (5,6,7) - . Having both ddk looks silly, and be should be changed to ddd.
00:21:394 (46) - why would you suddenly use kk here? Unless there is a reason behind, stick with kd instead.
00:25:640 - 00:27:338 - What about a smoother SV transistion? check out the screenshot:
https://derpovic.s-ul.eu/grh0xn1T.png00:33:706 - I actually would put a don note here to emphasize the first part of the "hand" spelling. but uh, up to you.
01:15:739 (274) - kat preferably? to follow the vocals that have the main focus for the kiai(s).
01:24:796 (313) - ^
01:33:712 (349,350) - purely from the flow I would suggest kd but sound-wise dk would be a rather logical decision. Either way, both options are better than kk. x:
01:47:440 (413) - Would keep it consistent with 01:38:241 (371,372) - , having them inconsistent although they mapped almost identical is a weird decision.
02:05:696 (485) - should consider a removal since for the BPM it feels really odd to play longer combos, especially when the song doesn't urgently call for it.
02:14:895 (526,527) - Hmm, the finisher doesn't look senseful to me. First because you didn't have them on 00:44:321 (133,135) - and second because there isn't much that is worth to strengthen. Also, consider adding a note on 02:15:178 - too.
02:59:050 - the SV boost should start from 03:00:182 - , not before.
[Muzukashii]
Nerf the OD to 4.5 or buff Oni (see above).
Kiai - a lot of emphasis gets lost due the very stiff mapping:
01:15:880 (221,222) - imo the vocals could be emphasized instead of the somewhat weak guitar beats in the background, would remove them.
01:24:938 (252,253) - ^
01:19:701 (234,235) - could be changed to
https://derpovic.s-ul.eu/IRb8lAqv.png01:28:759 (265,266) - ^
similar content applies for the 2nd kiai as well.
[Futsuu]
00:04:128 (5) - should be kat and..
00:08:657 (11,13) - should be don. the 2nd time it is slightly deeper where you should not emphasize 00:08:657 (11,13) - with kat notes but don instead. 00:04:128 (5) - on the other hand is rather light and works imo better with kat. plus it has some nice mirroring.
00:18:280 - 00:20:545 - this doesn't follow much here. Turn it to k d kdk k so the vocals are more determined and less "random".
00:34:131 (63,64,65) - The finisher notes overemphasize the song here and they don't really fit here, suggesting to remove them.
00:49:982 (96,101) - ^
01:19:418 (157) - I really don't find Dd pattern for lower difficulties good. I understand it can be used to emphasize the part of 01:19:418 - 01:21:117 - a bit more, yet it is in the gameplay pretty inconvinient to tap a finisher and then a normal note afterwards on 1/2.
Something that displeased me in the Futsuu difficulty is the strange finisher structure compared to Oni or Muzukashii. Many of them doesn't look that important imo and feels misplaced for an actually soft song, it is not calm per se but imo too soft as using many finisher to emphasize. Either consider to re-do that part or try to get more opinions for that case if you rather disagree on that point.
[Kantan]
Nerf OD to 3~3.5.
~(-w-)~