Small rooms don't suck in general, it's just MUCH more difficult to get control over room modes etc, cause they tend to be higher and more in the audible range.
I find myself to track drums in the iso booth more often than in the live room these days, but that small iso room is perfectly designed to eliminate room modes and have an even RT60....of course you won't get much room sound from such a room, but in return you'll get more control over the dry sounds.
so in general a small room doesn't HAVE to be bad, it's just harder (and more expensive) to make it sound suitable for drums than a big room, what I sometimes do when I want extreme control AND roomsound is I track in the iso room and then "re-Room" the drums...meaning I play them through the speakers in the live room and mic that room....
you can either leave everything to sound as natural as possible (cymbals very loud, no EC etc) when you're doing that to get a very realistic room sound, or you tweak your drums first and then "re-room", that way you get a room verb that you can raise higher in the mix without making it sound too trashy