It would be interesting to be able to set which clip was played next. The usual; next, previous, etc, but also an element of randomness. So that on each track a collection of clips that could be playing in different and/or in random order.

I could see it as a number of chord clips on one track, a number of melody clips on another, another could be rhythmic clips. If these could be set to play randomly, either completely or with some playing linearly, then it could produce an almost endless number of combinations in a relatively small composition.