This is the link to their response
In short:
We believe that the current arrangement – using PvP item level – has reduced the power gaps between players to reasonable amounts that make for fulfilling games where your team usually has a good chance to defeat your opponents in Arenas and Battlegrounds. You can get started quickly, and perform adequately, with Honor gear but still experience noticeable power increases as you acquire and upgrade your Conquest gear.
So they think they got it setup just right. They also say something about not wanting to change things this far along in the season.
I think really the thing to watch is what they do next patch. Everything you’ve said in this post they have heard 10 million times over. If they continue on with the power gap next patch, we will have a good idea of what to expect. Blizz will pretty much be saying “Take it or leave it” at that point.