I agree, that's the only thing that comes to mind when i hear the mix... the vocals, grunt/scream and clean seems to tiny compared to the rest of the mix, maybe that's exactly what they want, and it does work as a own sort of style, but that's what i hear as well...
Otherwise solid mix Matt... kick is indeed huge, (slate?) snare is there and takes care of the attack in the mix, guitars sound ace and crunchy, the bass is filthy but not overruling any other instruments and takes care of that low end just fine...
Good stuff!