Replace epic sones with PvP sones and merg all servers to crom now that you can do open world PvP on crom as well!
Make it possible to sign at least two players together. In the current state of the game, if it aint B&G PvP event you cant fight other players together without relying on getting on the same team in minigames which is a 50% chance. (This fact is also the one that destroys AOC PvP the most imo.)
If this were to happen i bet alot of player would return to the game. They would be able to encounter people out in the world while also have access to raid content.
Make PvP sones sub req. and alot of your returning players will also sub.