I'm still thinking this might be a simple volume thing, as long as the OP hasn't commented my suggestion.
It bothers me
what kind of bounce/export settings could decrease the "loudness and punch", as described in the firts post? Either there are FX involved or not, in this case I think not. If there's problems with dithering, sample rate or bit depth, it's not reflected in punch or loudness. Whether the routing goes through Master Bus or directly to soundcard, it's all the same, as FX are excluded.
If you guys wanted to decrease the punch of a drum track using only export settings, what would you do? I don't have a single idea.