Re: Routing JABB brush kit drums to separate channels?
Sounds like you've only tried using the full drum kits. Look in your instrument menu and you'll see that you can load individual parts of a kit - just the cymbals, the hats, the snares, the toms, the kicks.
In KP2 you simply load each of those individually, all in one instance of KP2. And you make sure to re-assign each instrument to separate tracks. For convenience, they could all remain on the same MIDI track, but you obviously want each one on a separate audio track.
That will give you 5 drum tracks, and you can process each of those individually, the way you want. As you indicated, now with the bass/kick drum on one track, you can apply its own EQ and of course leave the sound totally dry if you want, while the snare track can have reverb on it. And etc.