Ru/Rookie One in Rebel Tie Phantom. Generic pilot can be Rebel Spy.
Also rookie one in x-wing with the reverse of Luke's ability (convert one focus result to hit)
Han/Chewie in shuttle Tyderian. Generic pilot can be Rebel Assault team. Tyderian title (must be take) keeps Imperials from attacking until Tyderian attacks. Watch out for scum!
Biggs in Tie Fighter, generic can be Rebel Sympathizer.
Fel in x-wing
Vader and Stele in Tie Defender with different abilities. Stele can use shield tokens to boost and/or gain shield tokens with green maneuvers. Vader could fire lasers and ions/cannon/secondary weapon in same round (no idle time next turn like Corran Horn).
Tie Fighter titles like /gt that adds missile slot or /fc that adds target lock that can be passed to other ships
X-wing title that gives evade (stealth x) or torpedo that gives system slot (x-j?)
Astromech upgrade that gives crew slot
Scum versions of yt's, including smuggler versions of falcon and outrider. Scum transport. Imperial cr-90.
All bounty hunters as crew upgrades (mix and match!) and yes, IG-88 gets ABCD versions too.
No need to put out any ace sets/reprints (although blue tie fighter would be nice, and an x-wing painted as an obvious red 5/2/3/what ever). This could be an all cardboard upgrade. Don't even need new dials, but would be nice to include.
Anything else y'all want to see, pertaining to easy variants or flipping factions on existing ships?