Your hitwhistle is messed up by samplesets. For example, please check 00:33:108 - and 00:33:736 -, first whistle is recognized as drum-hitwhistle because there's a kick and you use drum-hitnormal to hitsound it and second whistle is a soft-whistle. While there's not much difference between them in the song I'd consider this as a mistake rather than intention.
To resolve this you could change hitsound's Additions to Soft under drum sampleset.
There are much more instances across every difficulties so I won't mention more, better fix all of them.
Hitsounds for the intro don't really match what you're mapping in pretty much all of the difficulties. Might be good to just redo them tbh. I left some individual suggestions on the difficulties' pages but I think you're better off just redoing them