I have seen the movies (again
) recently.
Really this game system fails to simulate the "feeling" of the star ship shields in the movies. Before fundamentalist of the game go mad, although this game system is rather good, no system is perfect.
In the movies, systematically, shields have to be dealt with before you can start damaging the ship. We always see that shields can take a certain amount of damage before they collapse, then and only then you can start destroying the ship it self. There are also some scenes where you see people in panic because shields are going down, but then they can redirect some energy to them and save some time.
This is not reflected in any manner with the set back dice system.
I think that may be a better option would have been to give Shields the role of Hull Trauma. That is, they have a certain amount of damage they can take before collapsing. In that way also, the action that allows you to repair hull trauma will nicely mimic the scenes where they manage to redirect energy to the shields.
Additionally, hull trauma should be totally gone from the picture, that is, the moment you loose your shields you are susceptible of suffering severe damage (critical hits).
Finally the armour value of the ship should take the role of the shields, that is, add set back dice to the attack roll (only once the shields are down) to reflect that sometimes you hit a very well protected part of the hull (a high roll with the dice) or sometimes you hit a very exposed part of the ship (low roll).
Just a thought