02:20:021 (140021|3,140366|0) - would suggest shortening these to 1/2 lenght to better match the lenght of the "oh" vocals
02:10:625 (130625|0) - suggest shortening to end at 02:10:883 as the word the ln represents kinda cuts off into another word
01:29:331 (89331|2,89504|2,89676|2,89849|2) - as this is the only 4 note anchor up to this part in the first kiai, the infrequent use aswell as i dont think it serves a purpose, id suggest moving 01:29:849 (89849|2) - to column 1 instead
01:34:849 (94849|3,95366|3) - id suggest moving one of these to column 3 instead to get rid of 4 note anchor here aswell.
Chord usage
Personally, and this might just be me, but im not a huge fan of quads.
Now im not saying that you should remove them, but limit the usage a bit as its not super consistent.
The consistency im suggestion is to only have quads to the appropiate snares, meaning that you should reduce certain quads to hands, namely quads like 01:17:435 and 01:20:194 (as these are kicks and not snares)
Diff spike "issue"
I personally would consider this diff to have a slight issue with diff scaling, as the chordjack sections is very standout compared to the rest of the chart.
Here are some suggestions on reworking sections slightly to improve on this slightly
Keep in mind that this is all my personal oppinion, the diff "spike" might not really be an issue
00:11:228 to 00:33:297 as suggested in 2135207#4265010 id like to change certain notes into 1/2 lenght ln's to portray darker synth sounds
00:33:297 to 00:55:366 Layer in the synth with very long ln's. Im talking one between 00:33:297 - 00:36:056 - 00:37:435 - 00:38:814 - 00:41:573 etc
What i mean is that there is a ln that you hold during the entire synth sound, basicly reducing the playfield to 3 columns while 1 column is occupied by ln for synth.
00:55:366 to 01:06:400 start mapping jacks here already, reason is because this section is very empty and straight after is the chordjack section, its a very jarring shift imo. The song allows you to map 1/2 snap jacks already due to the repeating 1/2 synths, if you want you could make them longjacks or just good ol' 2 note jacks, but there should atleast be jacks of some form or at the very least more notes.
These rework suggestions apply to the same later sections that are similair.
Like for example 02:23:642 start using jacks here, 02:01:573 long ln's here (could be used even if the synth is subbed for piano) 02:12:607 ln for dark synth
00:11:228 forward, assuming the ln's portray vocals.
There are imo some ln's here that are a bit too long and should be shortened as the vocals kinda cut off or at the very least, the word stops (although there might be some lingering sound)
Here are some examples
00:11:918 (11918|3) - shortened to 1/2
00:14:676 (14676|3) - shortened to 1/2
00:17:435 (17435|3) - shortened to 1/2
I would also like to suggest changing the notes that represent the darker synth into ln aswell. (some examples of these 00:18:469 (18469|0,18987|0,18987|3,19331|3,19504|0,19849|2,20366|2) - )
Reason is to make this section atleast slightly harder since imo the chordjack section later into the song is quite a diff spike comparatively, though ill elaborate on that in another post
00:09:590 (9590|1) - think this note is misstimed, atleast if its supposed to portray the same sounds as intro before the ln start. Should be at 00:09:676 instead.
Also missing a note at 00:10:021.
00:06:918 (6918|2,7090|0,7090|3,7262|1,7435|1,7780|1) - this is reference for how the sound goes, its still present in the same way, just softer and more in the background as the vocals are kicking in
First couple notes mentioned are probably a sequence of 6 1/12 notes but it would be too dense imo aswell as a 4 note roll feels better id say, i would say that the sound of the roll is so fast that at normal speed or even ht you cant tell the difference so will keep as is even though its "technically" wrong
Second couple notes mentioned are 1/8 im pretty sure.
Closing, for reason stated above aswell as the piano sound is shorter compared to 00:59:267 (59267|2,59531|2) -
The chords here are structured after the darker and more bassy synth chords that are paired with the kicks while the high pitch synth/chime melody is left out as in my oppinion, the bassy synth+kicks is more prominent and the high pitch synth is more in the background.
00:37:137 (37137|3,37137|2,37137|0,37387|3,37387|2,37387|0,37637|0,37637|1,37637|3,37887|3,37887|1,37887|0,38137|3,38137|1,38137|0,38304|0,38304|1,38304|2,38554|0,38554|1,38554|2) - is the only part where the bassy synth actively changes chords outside of the established pattern.
Personaly like repetetive patterns when i deem them fitting, which i do here, however if this is a problem rather than a suggestion ill change it ofcourse.