A suggestion on how to give drums "meat:"
EQ and Pan. Each person has their own preferenecs, but slightly panning each drum will add a little depth. EQing so that each drum has it's own frequency (bass drum will probably claim a low range, snare probably a high range) where it's allowed to "punch" through a little bit will add a lot too. Because you've assigned them their own frequencies, you can turn up their volume a little and it won't drown out the rest of the instruments. Try it out, see if you like it!