In 20+ years of gaming, the Holy Trinity (Tank, Healer, DPS) has never ever not been a good idea or worked. The/Our problem is almost no one spec'd from the start to level as a true Tank or a true Healer. We have DPS coming out our ass, but we lack dedicated Tanks and Healers who are highly active during prime time hours.

Something to think about because that paradigm is going to have to change in order to run instances and be combat effective in non-horde PvP.

Don't make me have'ta Troll ya Bro!