Quoted for emphasis.
You're biggest enemy is yourself. I only played 4 games yesterday but at 17-19 kindafigured we were goners. Bad engagement from enemy team ("we won already, it won't matter if the 2 of us dive their team" style) and within moments it was 21/20 and we were in the lead with 4 of them waiting 50+seconds to respawn.
Never give in, never surrender!
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My WoW PvP queuing experience varies massively from your own. As Alliance by far the most common map I see is SSM.
a veto list would be really nice. same as starcraft with 3 vetos. Eternal Conflict is about to be as bad as well or at least it suffers from all the same things