The announcement of Ion Thruster Override as a talent, with it's "TIE" restriction and the blanket ability of the V-Wing to equip "TIE" restricted upgrades suggests that FFG are looking to reopen the design space for TIE only upgrades.
In 1e, we saw this come about with two modification upgrades: Lightweight Frame and Twin Ion Engine Mark II. I'm guessing that no one except Striker and TIE Bomber players want to see Lightweight Frame come back, though, so let's talk about T.I.E MkII
Twin Ion Engine Mk II had the simple effect of making all bank maneuvers green (now blue).
T.I.E Mk II presents an interesting question, I feel. It occupied a little niche that actually very few cards did - an upgrade card that is simply a straight upgrade. Take something you already have and make it better for an appropriate amount of points.
Interestingly, most of this niche has actually been preserved in 2e. R2 Astromech became R4 Astromech and is now half the cost for the same effect. Scum lost Salvaged Astromech, but gained R4 anyway with the slot itself becoming unified. Nien Nunb got better on the ship he's supposed to work with (Lando in the Falcon). Hull and Shield Upgrade both made the cut, even after a lot of other 1e Modifications were dropped for 2e.
Is this a good thing, though? Are straight upgrades good for the game or should each upgrade card present more of a choice? Would T.I.E Mk II basically just be an Imperial/FO R4 and be just as inoffensive? Or is universally making all TIE dials better a dangerous proposition? Is the fact that this is now Nien Nunb's unique ability an issue? Would it be unfair for the Imperials to get a 'generic' upgrade that can be applied to all ships in a list that does the same thing as an effect Rebels can only apply once?
It was barely taken in 1e, and most TIE dials haven't changed in 2e. But is stress mitigation more of an important mechanic now that shouldn't be sidelined?
Would this simply come down to cost? Is there even a possible cost for such an upgrade that makes it an interesting decision, or is one cost an autoinclude and a point above that never taken?
Interested to hear your thoughts. If T.I.E MkII is a bad upgrade, then what might a good upgrade that occupies this new TIE only niche look like?