the biggest problem I see with any star wars MMO, is making it so Jedi or Sith arnt the end all be all class, if they go any route that includes non force wielders.
I think it will flop for being an MMO based in a world where the strong are NOT many in number. Do you know why WoW is popular? even though it does self glorificate the player characters abit, no player character is a class that would be few in number in the world. WAR is similar, because its based on a pure army peice board game.
The fact is, Star wars MMOs have to either be either totally neglecting the force on their players, or EVERYONE can use the force like they are masters. and either way, as an MMO, that will flop.