Force Field certainly needs to be reworked, it's one of the most lackluster sets in the game. Cold Domination completely outclasses FF, it's not even close. Currently it provides defense buffs and that's basically it. Knockback is terrible and annoys many people, so I'm not even going to count that.
Personally, I think it should get some sort of debuff for me to even consider playing it. Cold has Sleet, Benumb and Heat Loss, along with the Ice Shields, while FF is stuck with PFF, Repulsion Field and Force Bubble. Gross.