I have suggestions since everyone seems to be in the mood for it.
I feel that crossbreed characters shouldn't be able to get a high level of either side. If said character gets E-11 lvl 3, then he cannot go above level 1 of force powers and vice versa. It would allow Mara Jade type characters(able to use the force, but proficient with blasters). This way, we can't have anyone with lightning 3 + dets or something really out of this world.
My second idea goes out to the DL-44 a.k.a. pistol. I feel the primary fire is pretty fine vs. gunner, not so much vs. jedi/sith. I feel that a burst fire for secondary would be very appreciated. It could fire 3 power shots in a row, and could do some moderate DP drain. It would be like the DL-44 that Han Solo uses in Battlefront II.
My third idea goes out for the E-11. I feel that the primary is fine, but again a change for secondary. Give it back the fast but inaccurate RoF it had. Good for keeping a hallway down, keeping people at bay, etc. etc.
That is all I can think of atm, too tired, might update later.