00:41:479 (1,2,3,4) - seems a bit of a difficult pattern for hard, I'd suggest Ctrl+G on (1) and stacking (2) on (3)
00:48:819 (2,3) - I believe These unstacked notes doesn't really catch the background instruments stopping so you can stack those as well
00:50:734 (1,2) - perhaps swap new combos to put more emphasis on the whiste+clap hitsounded 00:51:053 (2) -
01:21:692 (1,2,3) - make sliders curvy/change style from (1) since a new instrument is introduced
its really not necessary just to slow down one slider, if it was a reversing slider itd make sense but nahhh