I would change osu!taiko kiai effect to not flash the notes but to do something else, like summon a visualiser line, on top the playfield lane so it wouldn't give me headaches after playing anything 190BPM+

I would replace everything with "Rafis hddt" skin elements and call it a day. (this is revenge for the fact that the legendary skin is not included with the game)

Transparency in circles with "pro" version

make the middle column on odd key counts normal sized
like why tf is it so wide
also add a yuzu in catch and for 10k+