So I've been curious about this. I don't really use my feral side all that often seeing as I'm full balance/intesity build. But I do have 5/5 Furor and 3/3 Natural Shapeshift to help with my pvp opener. Prowl/Pounce/Rip/Bear/Bash/Cyclone/Starfire/Root... Yeah its a long opener. But anyway, this is more towards PVE.
I don't really use bear and cat form that often seeing as I'm always rooting/nuking mobs down if they're outdoors while I'm grinding/farming. But the thing it boils down to is would it be plausible for a full balance to utilize a tanking set for certain things like some raids/instances. I already lug around a myriade of healing gear 3 pieces from kara, some quest/rep blues and greens I've supplemented from AH. I know that there is a stigma about druids always running out of bag space but would it really be worth my while to build a tanking set? I've already had to stop DPS in kara if a healer goes down or has to leave for some reason between bosses. I can heal the trash w/o much of a problem.
I guess the main question I can really boil it all down to is this. Can a druid thats spec'd only in one tree really be a truly dynamic player and fill the 4 rolls to the best of their ability or, as I figure the answer will be, will I really only excel more in casting dps and falter enough in the latter rolls I attempt to fill.
This post is all over the place but if you can make sense of it, please let me know what you think.