00:23:534 (1,2,3,4,5,6,7,8,9) - Combo felt a bit longer than usual for this part compared to the others, could be NC'd at 00:24:492 (3) - 00:26:087 (8) - or any other reasonable choice
00:38:534 (3,4,1) - Odd choice for the hyperdash imo. I'd go for the regular hyper between (4,1), since you have the vocal + drum on the white tick, compared to a more lower sound on the blue tick
00:41:087 (5,1,2) - In this case, I'd just remove the hyper (1,2) by moving 00:41:407 (1) - at the left side of 00:41:087 (5) - . Current hyper choice doesn't much too well with the more important vocal/instrument parts.
00:48:428 (3,4,5) - Both hyperdash placements (3,4) or (4,5) would be okay in this case, depending on what you want to enhance (slightly higher drum vs vocals), so it's rather optional to change. If #4793288 gets applied, this one could be changed in a similar way too.
02:41:405 (9,1,2,3) - 03:02:150 (5,1,2,3) - They break the guideline for Rain where Hyperdashes that are basic-snapped should not be used consecutively when different beat snaps are used, though its usage is rather justified + balanced
03:24:331 (1) - imo a bit wierd that the outro isnt mapped like other diffs, i can see the intro not being mapped but outro feels a bit empty(?) since you still have 20 seconds of song going, would consider doing it