Consider disabling cross realm BGs for Frostmourne?
At the very least I'm just asking if the algorithm that's supposed to match players fairly by gear can be looked at. I queued 4 - 5 battlegrounds at level 76 and waited in between some games to try and mix it up but every game I was the only person from Frostmourne as well as my team being heavily out geared.
I really don't see a downside to having bgs within realm on this fresh server where everyone is still gearing and leveling. The players on the fresh server are at a disadvantage in battlegrounds when put up against geared players from Lordaeron and Icecrown.
I can only assume from my experience so far that level 80 bgs would be no different and fresh Frostmourne 80s will be put against geared 80s on the other servers.