I agree for it , but teams won't be fair (i mean in skills, not in number , and you can say i'm too proud of myself, i don't care ). And about teamplay, i more think it'll be big massacre than something else L'enfer, c'est les autres.
Might be interesting, but we'll have to play quality over quantity, something like 5 EYEs vs others. But still, it would be hard to arrange it I believe, because people would leave or go picking mages or priests class and the whole game would become a bloody carnage, which isn't fun. For me at least, that is.