5.1 is bringing some new stuff. A lot of it is still in the works and I doubt has been finalized. One of the incoming changes is a quality of life tweak for PvPers of Battlegrounds and Arenas alike: voice announcements.
You can whack the youtube video to hear some samplings that have been extracted if you’re curious.
Personally it’s a little bit “meh” to me just because I don’t PvP much. What I do do is watch or listen as my wife and son PvP. It will be nice to know without having to bug them how the battle fares thanks to these announcements.
That, of course, leaves the assumption that they won’t be asking me to search for an add-on that disables these voices once 5.1 hits.