Patch 3.3.5b and Positive changes
The current meta game is completely unbalanced. Hpal/warr is dominating 2-s so heavily it's not even real, putting of every other comp that is not Hpal/warr or some hard-counter to them. 3v3 is horribly inactive. SoloQueue is the cancer eating almost all of your player base (Needs to be removed forever!). On top of this the "merge" brought no people whatsoever, the server population peaks at about 800ppl prime time, while Ragnaros and Deathwing peak at like 3500ppl each!
To summarize:
Not only you don't get new players because of how unatractive the ladders are, but you are also pushing away 2.3-2.5k players like me. Yes this is not rank 1 material, but this is your core group.
Suggestions:
1) (short-term) Bring back 3.3.5b patch - while it was not perfect, it was a solid step in the right direction. Improve it even more with time.
2) (long-term) Complete a real merge with the other WOTLK realms, or at least make them be in the same Battlegroup(retail-model). Having a pool of 8000 or more people, available for arena, is what you should strive for. Here appears the issue with possible 3.3.5b patch active on AT at the time. Simple pvp gear only, while in arena, condition will do the trick!
Best Regards!