Well, first of all, just play PVE servers like the rest of us. Then the imbalance does not really hit you at all.
And also, even if the servers are balanced, it still does not stop 40 players from getting together and stomp people in specific areas. Just look at how streamers since the dawn of time have been able to gather large amount of players on nearly any server and do big things with them. Making the servers balanced will not create Tarren mill-vs-Southshore all over the place, it requires the players want to do it in the first place.