There have been some changes which are very encouraging and are outlined in the beta forums for PvP.
I am still not sure if we are allowed to copy paste from the beta or if we can reveal this information yet, but I really think there have been 2 QoL features that will change the landscape of PvP Queues and BG's, not to mention improving elements of the PvP grind.
EDIT: Far more than just two actually. I just dug a little deeper and there are several appropriate changes which will be introduced in SL.