Seriously, how would this affect things: "No ship can equip more than four upgrade cards with an equipped value higher than 0." So, Chardaan Refit would not count toward the four. XX-23s on a Vaksai would not count toward the four. But Vectored Thrusters on a Vaksai would count toward the four.
Or this: "No ship can equip more total points in upgrade cards than 20% of the ship's base value, rounded up."
Could either of these be done seamlessly in the current game? (By "seamlessly," I don't mean "without affecting current builds." I'm asking if there are any problems with it in the rules, in game balance, or (most likely, IMO) in tournament logistics. I've been thinking about it some, and it seems to solve a lot of problems with the current game, but I don't see everything, so I'm outsourcing for thoughts.