I think an easy fix for this is make it a title for Interceptors only, like the A wing. Something the lines of if you do not have an EPT slot, you gain EPT slot. Players then have to choose between an extra Mod slot or an EPT slot.
Wouldn't it be a little silly to not have the very Royal Guardy Kir Kanos not flying a Royal Guard TIE, though? I'd make it a mod. I've said it before, but this is the way you fix the Interceptor.
Dodgy Mod (modification, 1 point)
You may only equip this card if you have both the [barrel roll] and [boost] icons in your action bar. At the beginning of the combat phase, if you are not stressed, receive one evade token.
Now you suddenly have a reason not to use Push the Limit, opening up the EPT slot to experimentation, and this mod, as far as I can tell, has complete anti-synergi with Fel's ability, thereby improving every Interceptor except for him (though Lorrir and Cowall aren't huge fans either). I think it would also would be an interesting alternative to Autothrusters on Starvipers, potentially making at least Guri viable. Strong with the Adv. too, but again, doesn't work with PTL.
My only reservation would be that it might make the upcoming Fang Fighter too powerful, since it would fit its head on flying style better than Autothrusters.