How bout this? it does the opposite of Autothrusters. That means Fenn Rau wants this more than AT, because it works nicely with the Title and his ability BUT leaves him susceptible to turrets.
Interceptors can take both, but being in arc at range 2 is still a serious counter to them, as well as Fenn Rau. It also doesn't increase their effectiveness against turrets.
Vader wants this, because he will literally take anything, just to help him survive.
It makes TIE-s tougher jousters, which is nice in the era of fully modded 5 dice attacks.