I have'nt commented in a while... but I've noticed that each new build seems to become more buggy. It seem the old saying... "if it ain't broke... don't fix it" may have more truth to it than people ever realize. If anything... I would say concentrate on better... varying sounding drum kits... and make sure it exports easily into other Mac based music programs (a.i Garageband).
Sometimes less is more.
But then again... what the hell do I know.