Hey...I'm no drum room expert..
...I'm just relaying from my own experience that smaller rooms can actually work well in many situations, maybe even more so than huge rooms.
Most of the big studios have all kinds of movable/temporary treatment that they can bring into a huge room or take it out as needed to adjust the ambiance, but whenever we see pictures of large studios, they always show these cavernous spaces, though I don't think they record everything with that large ambiance.
I think the trick with smaller spaces is more absorption...which gives the illusion of a larger space since there is less immediate reflection...but...being that the walls are closer in, you get this acoustic compression that can work well.
Many great records back in the day were cut in small, cramped, almost basement-like rooms...and yet, with a touch of added (reverb/delay) ambiance they could still mold the "size/shape" that was appropriate for the song.
If you have a large room that is not treated, it's IMO as tricky as a small room...'cuz you get that longer delay, which can smear everything...but then, stick a solo
acoustic guitar or piano or vocalist in there, and the large space makes them shine.
So it's six of one, one half-dozen of the other....