Heya,
really like your metronome allthough I am a Guitarist, but who knows, one day I prolly will make a few steps on drums too ;)
Here is my suggestion:
Would be nice to have a bunch of rhythm presets eg Blues, Rock, 8beat and so on. Could be in the way of a collection, where everybody can store the patterns into a specific group of rhythms, which can be used then by anyone else.
Cheers, Steffi