I would say,..if that is the room you taped your drums in,..leave it alone. The drums sound great. Nice stereo image. Beautiful job! No rvb or effects needed on those.
The guitar tones however,..in my opinion,.. need to be fatter.
I think a verb or delay on the vocs would not do well. They sound fine.
The only thing I think you need to work on is the guits. As stated earlier,..clean up the dead air with a gate. Also,...if theres a bass in their,..I cant hear it.
Really nice mix so far.
Nice job.
Take 'er easy,...
Calwood