House rules for Force Fields

We are thinking about changing the rules for Force Fields in our Rogue Trader RPG as we see some problems:

  • The percentage is rather cumbersome and adds a lot of rolling dices during the combat.
  • The "complete or no" negation is an issue. With that kind of rules, a Force Field can completely negate the shots of tanks or even titans for several rounds, specially the stronger fields like the Eldar Force Field with a shield rating of 75.
  • It doesn’t really match with the fluff. Goge Vandire had himself shot and was protected only by a force field, a risk he’d probably not have taken if the Rosarius only had a 50% chance of stopping the shot.

Has anybody created house rules for those shield in order to address these issues? I’ve found a discussion in the FFG forum and there are some interesting suggestions but in the end, they all lack of the problems mentioned above.

We’ve thought about a fixed number of hit points for each shield but a member of the party is not happy about that. I therefore thought somebody here might have an idea on how to solve the issue. Suggestions from other systems using force fields are also very welcome.