00:30:571 - I think this sound here should be mapped, it think you could something like this https://i.gyazo.com/95eb6fdb0954ed2df071623f85dade8e.png with an NC to indicate that this is a weaker sound than the rest of the stream
00:39:008 (1,2) - quite an unexpected gap I think for that bpm, maybe make 00:39:008 (1) - into a slider ?
00:39:184 (2,3,4) - this rhythm captures that high pitched sound better imo https://osu.ppy.sh/ss/1234422 try it with low playback
00:50:961 (1,2) - i think ctrl+g fits better imo because this movement at 00:51:078 (2,3) - feels awkward
02:11:762 (8,1) - you could do something with spacing like for #742126
The fact that you mapped it here also reinforce my point on #742126 to map the last note of the stream
02:47:446 (1,2) - I don't think there's a reason for such different slider shapes, compared to the rest of the sliders in this section. They feel out of place and I don't hear anything in the songto support those kind of shapes
02:48:852 (3,1) - why dont u do the same overlap thing u did with 02:45:102 (5,1) - ? it feels like youre introducing a concept that you never use again