I don't own an Audya (yet) but here is my educated guess: if Leezone refers to the audio drums obviously there is nothing that can be done, but if he refers to a midi drum track there is always the possibility of editing the velocity of the single notes (to make them louder), or one could choose a different drum kit (to solve the "toms" issue). I think that, in style edit mode, it should be possible to insert a program change number at the beginning of the measure, to call a different sound (like a slap bass instead of a "regular" one). So, with a bit of work, everything can be done.