PvP arenas should be a totally random queue. I understand people want to group with their friends...but for the purposes of PvP arenas, it should be all random, no groups. Not unless you can get 2 groups of 5 willing to go in.
It's too common now for a group of higher levels to join queue then go against a random group of very low levels. This not only makes it extremely unfair for those lower levels, but it also puts a bad taste in their mouth for ever doing it again. There is no point for any person to join the PvP arena if they can always expect to go against a group of high levels.
There is no reason to allow groups to queue PvP, unless as I said, it is 2 groups of 5 who may want to queue vs. each other.