Max: when you are involved in a huge gang fight eg. 4 players and above, you normally concentrate on ONE person alone anyway. In which case, it's still a 1 on 1 situation. In fact, when playing Quake or any other shooter games for that matter, no one in the right mind will try to strike an enemy and when he fails to kill him, he'll then go for another one. You're just opening yourself to more attacks.
And Razor has a point. If a merc can be as powerful as you describe, then why can't the pure Jedi (assuming we've got more force powers and skills)? lol
Besides, we can "penalize" cross characters by adjusting skill points cost.