If they really optimized game engine it would be very useful, considering, for instance, how laggy it gets even in 20 vs 20 Nation Wars matches with all those shiny effects on and skills being used all over the place. Game engine indeed is old, though I believe it has already been optimized and adjusted for Forsaken World and other games from that league. I don't see any problems doing the same for PWI and consecutively to EPW as well.