The Icecrown BG scene is awful
Lately I've been doing a lot of solo queue bgs on both Icecrown and Frostwolf, and I would say that good, close bgs have been about four times more common on Frostwolf than Icecrown. It's basically a rare occurrence on Icecrown to get a truly close, fun game. And with deserter being 15 mins as opposed to 5 mins in MoP, leaving the bg early is a lot more painful.
I think a big part of the reason are the AV enabler premades on Icecrown. I'm not hating- I've participated in them myself- but it just gives the bg scene a trollish quality. The whole mentality seems to be "we may not be having an exciting game, but it's better than getting farmed in the graveyard like you." I'm not even sure that Icecrown bgers realize how bad the scene is, since they are used to it.
It would be nice to see the big pvp guilds on Icecrown get away from the feeling that they absolutely can't queue up if there's the slightest possibility they might not have nine 6.2k+ gs team-mates with them. There is actually such a thing as a bg scene in which players on both teams have fun and they try to promote a healthy competitive scene instead of trying for the most overwhelming advantage possible.