Hmm, wonder if 4 shadowpriests and a prot pally would work for dungeons. Still holding out hope for the 5x pally team though. If shadowpriests can kick out enough passive healing for the tank, I might give them a shot. Then again, blizz still has a lot of work to do on pallies... Maybe they will boost divine storm healing back to about where it is now.
I think in another month or two we will all know for sure what kind of teams will and won't work for pve and pvp. I just wish blizz had a better way of going about "trying to reinvent the wheel".