OK I get it that everyone says how Horde's racials are so OP for both PvE and PvP but good god one thing I've noticed in my time doing BGs and epic BGs while in merc mode is that Alliance are literally just bad in terms of PvP and it has nothing to do with racials at all.
Example one: doing WG as Alliance on the offensive and we broke down not one not two but THREE walls during our fight. Most of the fight we had either 12 vehicles or 16 up. Not one of our towers were destroyed because the Horde weren't even attempting to do it (probably because of epic BG quest this week) Three walls AND full timer because no towers were destroyed means we won right? NOPE. We broke down three walls on the outside of the keep and didn't even get in the inner part at all. All of this because people were idiots and couldn't focus on one side.
Example two: In IOC as Alliance again and we manage to break down the wall to enter the keep a good 4 minutes before the Horde were able to break the Alliance wall down and enter. Sounds great right? Nope! We had him at 64% when they went all in. We lost with only being able to take him down to 12% before the Horde killed their boss.
Example three: In Twin Peaks and we each team has the flag. They have a resto shaman and balance druid holding their flag in their base. We had 4 people with the FC guarding him, 4 people fighting mid, and me a resto druid being the only person even going to their base to see what's going on. Mind you we had THREE rogues plus me being a druid that could all stealth in their base yet nobody wanted to leave mid or the FC to do it. With 4 people guarding our FC they still managed to return our flag and obviously we lost that match.
Example four: Doing Eye of the Storm and we have two bases and have been flipping or stopping the Horde from getting a second base. We have the flag. We are up by about 500 points. We cap the flag instead of holding onto it when there was no pressure on us at the base where the FC was. Horde controls mid. Horde then proceeds to run 4 flags back to back by controlling mid. We lose.
Something I noticed is that when EMFH got nerfed and is not as OP as it was for the two expansions, Alliance can't seem to win in battlegrounds. It is as if ONE single racial carried an entire faction in PvP and when the Alliance lost it, they couldn't win in PvP for anything.