I'm all about improving the game, but we have enough balance problems as it is. You do realize that the game calculates damage and bonus damage differently for single, double and staff sabers, right?
So you don't just want them to stick a different stick in the toons hand... you want them to load all new animation, damage calculations and god knows what else (that will mostly all be bugged, btw) so you can carry a different light saber.
Sorry, to me its a waste of dev time and totally unnecessary. The classes are the classes, you don't like that part of the class, don't play the class.
Let the devs spend their time fixing the stuff they already broke, not screwing with stuff that works so that they have to go back and fix that too.