FroZ - and here we have a problem. Do you want an easily balanced game with four generic civs, or a more difficult game to balance with four unique civs?
The Rebellion, Republic, Confederacy and Empire are very different to each other, and they should play that way. If they dont, there is no point in even bothering with the game, because there will only be one civ. Therefore, to have uniqueness you must have different playing styles. As i said, the Confederacy and even the Empire simply do not sneak around. The way they are portrayed in the films confirms this, and if you think about it, guys in bright white suits with huge vehicles really dont go well with being stealthy, nor do loud droids.
Dark Lord of the Purists
Inter Arma Enim Silent Leges