i kinda noticed that some of the svs for the lower diffs might be a bit fast (e.g. 1.2x sv for 254 bpm in muzu), you could try to adjust the base sv to fix this?
maybe try:
kantan (easy): 1.0x
futsuu (normal): 1.1x
muzu (hard): 1.2x
oni (expert): 1.3x
inner (master): 1.4x
this looks a bit better imo