I think people should just be glad with what they have been given and atleast respect how long it has taken people to build/create the server. Whether they play it is really up to them, you cannot MAKE people play A&T, but it seems that these new servers have a "1 day quality" to them. The first day/days of both A&T and the new zombie (hell even solitude now) had a large amount of players because it was new and exciting, people have lost interest which is a real shame considering that these servers are pretty damn amazing, even after the first few days.
Whatever may be suggested could run out of interest soon, shifting pvp from primordia will only make primordia the same as the current situation. If an equilibrium is put in place, perhaps all the servers can have equal players, and stuff like this won't happen. I really enjoyed A&T, and still do, but the player problem can't be forced into working again, and making new maps will take a long while with lots of effort. And remember, it's only beta.