00:00:359 (2,2) - sounds more legible if you make a clear visible slider path instead of that small overlap with one own body which can creating readibility issues for newbies, in fact they are extremely lower sv.
00:45:059 - Vowel gets no emphasis here when other soft vowels do get some emphasis (usually passive), for example 00:46:259 - or 00:49:559 - . (On higher diffs 00:45:059 - gets emphasis through a slidertick)
Because all other vowels do get atleast some representation it makes 00:45:059 - stand out alot.
You could make 00:44:759 (2) - a 1/1 slider for some passive emphasis.
01:00:059 (1) - i think have a small room for a triple here and shorten that slider as 1/1 starting here 01:00:209 - to balance with the insane/expert rhythm
01:02:459 (1,2,3,1,2,3,1,2) - how about buffing this a little more? i think is too passive and kinda unbalanced, to me sounds simplified a lot with that 1/1 and 2/1 gap, i think you can place the rhythm present on insane diff to fits, with a small variations on distance to fix that.
added a slider reversal on 01:12:059 (1), don't wanna add triples in this diff unless there's clearly a room for players to focus on triples like 01:59:309 (2,3,4) or 02:17:909 (1,2,3)
01:23:759 (4,1) - and how about decrease the distance between the notes? i think the 1/1 gap sounds a pretty high if compared with the previous gaps already did , i guess moving the 4 more close sounds more safe, this is the highest present entire diff
01:24:059 (1,2) - uhh any reason to make that long sliders instead of capturing the instrumental sound with more beats? the present form sounds a bit lackluster because this diff is the only who focuses to give priority to vocal when the others you change your mind to focus instr+vocal , i think have more room to doing that
01:49:859 (1,2,3,4,1) - this is kinda dense for a hard especially not in the kiai, could make 01:50:159 (3,4) - into a 1/2 slider or something to simplify
01:59:309 (2,3,4) - Is the first time 1/4 rhythm is used while it is on a calm section of the song.
Because you simplify 1/4 in intenser sections, it makes this case feel out of placed when compared to the rest of the map in terms of rhythm density.
You could either remove 01:59:384 (3) - or make 01:59:309 (2) - a 1/4 slider if you want to keep 1/4 emphasis. This would make the rhythm density better reflect the song's intensity.
im not the best at knowing how a hard is supposed to play anymore but from general ideas 02:31:859 (3,4) - this flow seems not intuitive for newer players compared to the rest of the map following the direction of sliders pretty consistently
03:02:459 - Rhythm in this section is the same as the intro section 00:19:259 - despite 03:02:459 - being arguably the climax of the song.
Outside of the increase of spacing and sv, 03:02:459 - is the same as 00:19:259 - . This leads to a missed opportunity to further cement this section as the climax and makes it stand out less.
You could make this section stand out more through introducing some variation or further exploration of the 1/4 (you mentioned wanting to keep 1/4 cases isolated with concerns of difficulty but I think in this section you can get away with it / it is justified when used sparingly)