Please remove guesting in Alliance Wars.
Guesting really only hurts the server:
1) There's no incentive to do objective based actions on a guest campaign (only farm AP)
2) Unless you're going for emperor, it's more beneficial to set your home campaign to a server that you're winning on and PvP elsewhere (atm, wabbajack)
3) Switching Home campaign should be free every few days to encourage playing with friends but not abusing highly populated servers.