00:20:164 -> 00:28:874 For this section both your chains are 10 and 11 notes long respectively which is way too much for players around this difficulty to follow and makes the section too dense in comparasion to the rest of the diff.
For the first chain, you could make 00:22:100 (6) - into a circle stacked on (5) to cut the chain here; for the second chain you could maybe adapt a rhythm like the one I suggest on the picture below since it follows the violin better, which seems to be what you were going for.
02:03:026 (7,8,1,2,3,4,5,6,7) - Rhythm chain getting a bit on the longer side here for this diff level, should break this up a little with deleting 02:04:605 (3) - and that should work just fine with a little bit of moving around which shouldn't be much of a hassle given there's a decent pause coming up too
02:28:339 (1,2,3) - Introducing this rhythm right at the end with jumps is a bit weird considering the spacing change. Maybe you should do what you did in Easy diff and replace these circles with a reverse slider instead
i'm okay with this for now. creates more of a lasting impact with those drums + the notes with the circles