http://blue.mmo-champion.com/topic/4...or-legion-pvp/
a few points to talk about.
The biggest benefit of reducing the predictability in gearing in PvP is we can offer gear on par with the rest of World of Warcraft’s end-game activities. Not only will it make receiving gear from PvP more exciting and rewarding, but it also makes PvP more attractive to all WoW players. There’s also been some concern from both PvEers and PvPers that “raiders will just do Arena to get easy gear” and “gladiators will just do Mythic raids to get easy gear.” We feel it’s important to remember how challenging both types of gameplay can be. Downing Mythic bosses and earning Gladiator rating are two of the most difficult accomplishments in our game. We think players who have demonstrated skill at those levels deserve to be rewarded with better gear.
So pretty much PvErs will have to win a atleast a few pvp battles every week if they want to min-max their chance to get better gear. And no, you dont have to be a mythic quality pve raider to win a few arenas like they try to imply in the post.