Thinking about stormtroopers and survivability, as well as a quick playtest where the stormtroopers won, Im going to tone their Armor down to 3pd/5ed, and their e-11 blasters down to 2d6. I also built the stormtroopers on 50 pts with ocv 4 and a skill level in blasters, which was too much, so I'll take away their skill level.
I think a dashing rebel captain with a 2d6 blaster rifle and 6 combat levels will be able to do 3d6, or 11 body ... two shots and the stormtrooper will go down, one shot if it's the head or vitals, or if it's a great roll of 30 stun or more. And after the heroes down their first batch of stormtroopers, autofiring their e-11 blasters should mow them down ...
This way, stormtroopers are great against common foes, but heroes should be able to make quick work of them.