Late reply but I rebinded my Hard Drop, L/R rotations, Hold Piece and ability activation keys. Having keybinds all the controls would be a great addition! If you wanted more QOL additions, you could also look into being able to change handling (DAS, ARR, etc.)
Oh, the reason I was asking is because the game shipped with full key rebinding! Under options, I was confused if there were possibly things you needed to rebind that weren't supported already 😅