I wonder what I am doing wrong.
I'm level 50 gunnery spec commando and I don't feel like a tank because I get killed VERY fast by any melee. Anyone who knows how to play the game can prevent me from getting a heal off, and if gunnery spec'd then a heal wont be very helpful anyway. Crowd control and force leaps or w/e you call them for empire completely destroys any benefit we should have from being ranged dps. Grav rounds take 1.5 seconds to shoot, and I get 1500 damage average on one. So I need about 6 seconds, with NO MOVEMENT to get 6000 damage... You probably have at least 2x as much health. I know for a fact I get hit by sorcerers and other classes for thousands of damage almost instantly, but I have to slowly watch their health bar drop down after shooting them and reloading many many times all while NOT MOVING.
I don't have champ gear yet, so that is probably the main reason though.