This is going to be a very challenging game to produce and balance. It's easy if Jedi aren't a class, but we all know that won't be happening. If Jedi are a class it'll be a big lightsaber fest and the alliance population will be 100x the sith (that's what happened with SWG as well). You really can't make a pvp game with 1) an imbalanced class (hero+), and 2) grossly imbalanced populations.

I think the voiceovers will be very fun and immersive for your first character, but character 5, and doing the same quest for rep or xyz, it'll be highly annoying.

I'd be very in to a Star Wars MMO done well. I'd like to see a little Tie Fighter brought in with vehicular space battles. That would be epic and immersive, but I don't really think enough players will be willing to play Sith to make PvP the fun it could be.