I think they are ok and if you miss the point of charge your sheilds down nothing you can do. Also if a non npc attacks you it gives you at least a fleeing chance rather than no chance 3 lots canon or laser all going for you think about it. they are pills for open play. they were a life saver in a hauler when i was trying to get a jump out of trouble they have their place as they are. do not nurf
There are better ways, fairer ways, more interesting ways, for both parties, in those situations. Why do we need shield cells?