So I think a great feature would be to add to the instrument section is a brush drum kit. Yes you get brush feel from the ballad song feel but the brush feel on up swing and other feels would be nice.

Another would be the ability to add multiple feels on certain parts of songs. Like having a Latin type of feel in the first couple of measures then switching to a swing feel.

Also solo break silences. Unless that's possible already. Like you finish the head of a tune and for a measure there's a solo break.