The other thing is, with four toons dealing DPS, we can down one toon in two globals or so.
Our toons should then survive at least four attacks, and possibly not fall until the eighth attack.

Battlegrounds, like Wintergrasp/Tol Barad are going to be more hectic than arena.
Imbalanced sides will be the norm, both in our favor and not.

I'd think the increased durability of toons in general, favors boxers more then non-boxers.
And we still have the edge in coordination of burst, whether we down someone in 2 or 5 GCD's.