I'm sorry, what was wrong with B-Wings again?
Jousters.
The old idea was that Turrets beat Arcdodgers, Arcdodgers beat jousters, jousters beat turrets.
Then Autothrusters came along to let arcdodgers survive vs turrets, and Engine Upgrade let turrets gain just enough arcdodging to beat jousters and TLT is a turret with near jouster effectiveness.
So far jousters havnt receved an equivilant buff to handle their nemisi- arcdodgers. The closest we have is the underrated Hotshot Blaster, essentially Scum Z and Khilrazx only, that lets them get just enough turret to annoy arcdodgers.
Because Rock-Paper-Scissors isn't a fun game. The game wasn't fun in the Jouster/Turret/Arc-Dodger phase, because one side had a massive advantage before the ships hit the table. Autothrusters help level the playing field between Dodgers and Turrets, where previously Arc-Dodgers could basically cry and explode.
Jousters seem fine, but because they have no dirty tricks or special moves to make up for their Jousting Values, they really need good jousting values, more than any other ship. Which is where the X-Wing, the Kihraxz, and to a much lesser extent the B-Wing fail.
U seem to forget feedback array which is slightly better by not being a one use upgrade. But you are correct that it's a scum only fix.