My suggestion for this game to keep players is to have varieties. It is kind of repetitive after playing for a while. For instance, can there be matches against other players and special awards from winning?
PVP /would/ be awesome, but we have a few other major mechanics in store that we think are even better, with lots of special rewards (plus, they don't require us to write and perpetually host a PVP server :P)
PVP /would/ be awesome, but we have a few other major mechanics in store that we think are even better, with lots of special rewards (plus, they don't require us to write and perpetually host a PVP server :P)