00:53:159 (53159|2,53309|2) - Particulary not a fan of this, I think it could stay but if you feel its workable to move stuff around then give it a shot.
01:00:459 (60459|2) - Would move this one to 1, I think the pattern there is likely the hardest 1/6 of the HD and it spikes a bit. If your intention is to break the flow of the stair you could try this:
Perhaps 01:07:259 - (similar reasons as previously stated):
02:13:859 (133859|1) - For this note SV I would slow it down a bit when its about to hit the receptor bar and then bump it up for the last note of the map, would be easier to read imo.
I just love this diff man.