I don't know if this horse has been beaten enough or not, but I was just thinking about what type of nerf could Biggs take that doesn't fundamentally remove him from the board, which in turn makes many other ships unplayable.
So the proposal (not sure if it has been brought up):
If you do not have more than 3 stress tokens, when another friendly ship at range one is declared the target of an attack and the attacking ship can target you, you may choose to have the opponent target you instead. If you do, receive 1 stress token.
This nerfs him in some ways but not entirely. R4-D6 is less effective(might encourage more R2 astromech), he cannot K-turn the next round, and likely no action, but it can play into your hand. Either they target Biggs, or you let them split fire.