"Sigh. Tanks in Arena are rarely fun for anyone but the tank."
-Ghostcrawler
Back in burning crusade when Tanks literally did 1/10th the damage OR LESS than that of a damage dealer we never saw tanks in Arena.
In wrath they gave tanks decent damage and arena players complained, were ignored, and blizzard said something along the lines of: Trying to make all specs viable for PvP.
Thanks for starting to realize your mistake blizzard.