I agree with Han Solo to an extent. I believe that Jedi/ Sith would rather have to be earned then selectable as a class (except of course, on certain maps, for example, if Geonosis were made for the prequel era, then Jedi should be a weakened version of the "Hero" Jedi).I also believe that Jedi should be a very unique "class", for lack of a better word. They should have abilities that no other class could possible even imagine beating, however the usage of such abilites would have to be truly difficult. Say, the ability to push someone down with the use of the Force would be incredibly useful. However, there should not only be risk in using it, but it should also require some skill to use. What I mean is, perhaps a very quick mini-game that would be required (such as, a certain, random button press) that would interpret whether the use of the Force would work.
Saber combat should also be a very important part of playing the class, both Saber vs Blaster and Saber vs Saber. I'm not a fan of, say, holding down the mouse button while shots come at you and you automatically block. I would prefer a system similar to that of Playstation 1's old "Jedi Power Battles." You would have to press the block button at the instant it would hit your lightsaber to return the shot directly back at your opponent. If you hit it within, say, a second or so before it hits, it would deflect, but in a random forward direction. If you hit it far too early or at all too late, it would not be blocked and simply hit you.
Saber vs Saber combat, in my opinion, should be only an occassional thing, as only the best of the best (in the thread starter's fantastic idea on how to implement Jedi/Sith fairly) have the chance to play as the reknowned Force Users. However, it should also be something very unique and very fun. I believe it should also be something that highly discourages soldiers to shoot into the fight. Perhaps, when two saberists engage fighting with eachother, a series of mini-games occurs, where the saberists would have a more limited moving ability, and whichever direction you move your mouse would be the direction your saber would swing.
More difficult to implement, but what I believe an idea Saber vs Saber system, would be where you come into close range with an enemy saberist and, as before, engage in a "Saber fighting" mode. At this point, your movements, again, become more limited, however you can, say, press a certain button on your keyboard to ecome more acrobatic, allowing for quick movements to dodge saber slices (think how Obi-Wan Speed-runs to avoid Dooku's slice in Episode II: Attack of the Clones, or even Yoda's agile style). During this saber combat mode, the right mouse would control (as an example) blocking. Holding down the left mouse would not do anything, but if you hold down the left mouse and move the mouse, you would defend in that direction. Successfully defending would, obviously, save your life, and if timed right, might even cause the enemy saberist to lose control of the saber, allowing for a counterattack. Along the same lines as defending, attacking would consist of holding down the left mouse button and moving the mouse, slashing in the direction which your mouse moves.
I believe that, however, would be very difficult, if not impossible, to implement. It would, in my opinion, though, be a very entertaining system that would constantly keep Jedi and Sith in the action, rather then simply being a support class. It would allow for a delicate balance between the simple Jedi and Sith that remain in back, assisting their allies, and the phenominal Jedi and Sith that are capable of taking on a massive army of soldiers on their own. Both situations would be fully possible, but obviously it would require the right amount of player skill in both situations to successfully be a Jedi or Sith.
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. If this happens, the commanders wont command, they'll just be fighting. 
Hopefully you understand my point from my example.