I know the mess that comes with a pvp realm ,I joined one on retail years ago and know how hard it can be , however it has its upside too. I learned to pvp the hard way and improved as a pvper .
I wouldn't want to see a division of a large player base, but I know years ago some people leveled on a RP realm, leveled up and geared up then paid to transfer to a pvp realm much easier.
That's one solution but we don't have such a realm.