Looking at the drummer from a bass player's perspective, the best drummers I've played with have command of the bass drum. A drummer plays lead AND rhythm...the bass (with the bass drum/floor tom) and lead (the other drums in the kit). The worst drummers I've played with concentrated more on fills and other "lead drum" stuff and didn't really get bass drum parts down correctly. That leads to bad timing when you don't concentrate on the bass drum's position in a song. I think the only way he's going to be a better drummer is if he can make himself a better bass (bass drum) player. I don't think that's going to happen, because he's probably a "lead" player. He's the kind of guy who probably couldn't grasp the bass guitar, but probably could do a passable job as a lead guitar player. Hope I didn't confuse you.