Sorry for the long wait and long post@@
Overall:For all diffs except fanzhen's diff, use some inherited timing sections (green lines) to adjust hitsound volume.
Right now hitsounds are at 100%; I suggest 70% as baseline.
Hitsound pattern is really... messy
[Easy]00:19:806 (4) - clap?
00:20:151 (5) - end of slider change to whistle?
00:32:047 (1) - I suggest this:

00:33:599 (3) - finish?
00:35:668 (1,2,3) - I personally don't like 3 claps in a row but nothing wrong really
00:37:047 (x) - add a note?
00:37:737 (1) - remove finish...
00:39:116 (1) - ...and place it here! (remove whistle)
00:59:806 (1) - finish at start of slider
00:59:806 (1) - you could have just repeat the slider and delete (2)?
01:01:185 (1) - ^
01:08:772 (5) - feels like something is missing here... maybe a clap?
01:09:461 (1) -
spacing error01:09:461 (1,2) - doesn't sound nice with either music or vocal
01:10:841 (1) - finish?
01:16:358 (1,3) - finsih?
There some places where it feels "empty". Use some whistles if you have to.
And also, compared to [Insane], the patterns in this diff
CAN be better.
[Normal]00:12:909 (2) - whistle?
00:15:668 (2) - ^
00:17:392 (4) - just finish (remove clap)
00:18:427 (2) - whistle?
00:21:358 (2) - clap at start of slider?
00:22:220 (3) - clap?
00:22:565 (4) - just finish? (remove clap)
00:23:254 (1,2) - hmmm...somehow I feel it's not following the vocal really well...
00:28:082 (5) - just finish
00:28:772 (1) - use some hitsounds in this combo
00:33:599 (4) - just finish
00:35:496 (1) - actually whistle here sounds not bad, why not try this somewhere else?
00:36:358 (3,4,5) - that's too many finishes in a row@@
00:39:116 (1) - finish?
00:39:806 (3) - why not just

00:44:634 (1) - finish?
00:48:082 (1) - make it like [Easy]? Sounds weird as of now
00:54:289 (1) - it's all 1/8 notes from here... variations?
00:59:806 (1) - finish at start of slider?
01:00:841 (3) - clap?
01:01:185 (1) - remove whistle?
01:02:565 (1) - ^
01:02:909 (2) - clap at end of slider?
01:06:530 (6) - space this out: I thought this is 1/4 note from previous occurrences such as 00:35:841 (2,3).
01:07:047 (1) - from this combo onward it's so quiet...
01:18:254 (5) - delete (6) and lengthen this slider?
01:26:961 (1) - how about remove this and end the spinner to 01:27:392 like in [Hard]?
As you can see already...you really need more work on hitsounds in both [Easy] and [Normal]...
[Hard]00:14:978 (1) - the clap pattern in this combo is completely different from the previous one!!!
Since you have more notes now, why not take
loveFantasy's advice and put claps on 偶數白線 across the entire diff?
00:29:289 (4,5,6,7) - not exactly pretty and geometrical
00:35:668(x) - map something here?
00:44:634 (1) - the clap pattern here is one exception, it sounds good
00:47:392 (1,2,3,4,5,6,7,8,9,10,11) - put these in [Insane] please
01:10:668 (5) - I expected a note here
01:11:530 (5) - new combo and add whistle?
01:11:875 (1) - remove new combo?
01:12:047 (2) - remove finish?
01:12:909 (1) - remove finish and add whistle?
01:13:082 (2) - finish on reverse?
01:13:772 (4) - finish on first reverse?
01:14:806 (7) - finish?
01:14:978 (1) - you may stop the 1/8 stream from this combo; follow the vocal?
01:16:875 (2) - remove finish?
01:17:737 (4) - clap at end of slider?
01:18:944 (5) - remove clap?
01:23:599 (2) - space this out
01:24:978 (2) - remove finish?
Oh my, I am sure this hitsound mod isn't all that I feel should be fixed...
But really...
a lot more effort must be placed on hitsounds...
I'm just giving suggestions...
[fanzhen's World]I've got a feeling that there are too many extraneous 1/8 notes in this diff... Especially latter half.
00:53:599 (10) - I prefer to start this slider at where (9) is
00:56:703 (5) - not centered?
00:57:048 (1,1,2,3,4,5) - I'd try following the vocal rather than using these sliders
00:59:806 (5) - from here...I'd suggest
[Insane]You can use a smaller spacing for triplet and other streams.
00:22:565 (5) - finish at start, nothing at end, and put a clap on (6)
00:25:668 (x) - add a note here and clap?
00:53:944 (5,6,7,1) - I'd replace these with a slider start at (5) and reverse at 00:54:289...just my opinion
01:01:185 (1,2,3,4,5,6,7) - shape the geometry better, ignoring distance snap when needed
SPOILERThe goal is to make 01:02:047 (6,7) at the center of pentagon 01:01:185 (1,2,3,4,5) AND stacking on 01:01:013 (7).
01:05:323 (4,5,6) - the clap pattern is broken here
01:22:737 (4) - ^
01:24:634 (1,2,3) - too many finishes, remove some of them
===================
Patterns in the first three difficulties are less of a problem when compared to hitsounds.
More effort must be placed on hitsounds!!!I hold back my star for now, but keep working!
Good luck~