00:03:372 (1,2,3,4,5,6,7,8) - from a progression standpoint in this build-up, these two ideas 00:00:252 (1,2,3,4,5,6,7,8,9,10,11,12,13,1,2,3,4,5,6,7,8,9,10,11,12) - and 00:03:372 (1,2,3,4,5,6,7,8) - would make more sense being the other way around, increasing object activity as you reach the peak at the spinner, rather than lowering intensity at 00:03:463 (2) - by filling the extra tick using tails. It's a shame because this build-up is quite nice until you reach the point where it starts to lower the intensity.
Perhaps you could get away with just using triples for 00:03:372 (1,2,3,4,5,6,7,8) - and also keeping the other triples at the start, otherwise, I'd recommend converting 00:00:435 - to the same rhythm you have at 00:03:372 (1) - before switching into the triples at that point.
00:11:753 (7) - consider playing this object in the lower half of the playfield to give more impactful movement at the point of the measure change 00:11:753 (7,1,2) -
00:18:606 (3,4) - feel like a reverse slider here would be less jarring since the last two seconds were 1/4th and what you're following here is much quieter than in previous instances of 1/3rds (00:11:264 (6,7), 00:15:669 (6,7))
00:23:654 (12) - the instrument you followed on 00:22:552 (4,8) isn't really present here, 00:23:562 (11) is a 4th beat longer
i'd say to remove 12 and increase spacing from 11 to 1, but there may be better ways to implement this rhythm
00:24:846 (5,1,2,3,4) - would try to make 5's sliderend the active rhythm in this section, increasing the length of the sliders and leaving room for another quadruplet in 00:26:773 (1,2,3)
00:28:150 (1,2,3,4,5) - rotating this pattern (by around 80°) would make the spacing between it and the incoming wave sliders equal, and i think the pattern itself would benefit from a slight spacing increase after 00:27:783 (9,10,11,12) (which the rotation kinda demands for if it's aimed at 1.5x from 5 to the wave slider)
00:32:555 (1,2,3,4,5,6,7,8,9) - I don't think there's enough preparation for a cut stream here, especially because of other sections that visually looks similar to this (e.g. 00:22:277 (1,2,3,4,5,6,7,8,9,10,11,12,1) - )
You could still keep the split, just move the sets of objects closer together to keep them visually distinct from other sets https://osu.ppy.sh/ss/16914523/bf63
00:33:289 (9,10) - holding until white tick and clicking on blue tick feels pretty awkward and misses the emphasis of the beat here, would just https://i.imgur.com/4LCrQtY.png
00:34:849 (1) - 00:36:318 (1) - not sure what beat the tails are following when they land. Double check these are correct, or if they need to be extended