Ship idea: Rebels TIE Fighter aka Sabine's TIE Fighter

I loved that. But, it was her and ezra who are already pilots on other ships. 

Cool idea. However for pilot it'd best be Rex or be pilotless. Since I can see CG making ahsoka fulcrum pilot the ship she does in the ahsoka show with Hujang. Since GLs don't usually pilot ships. That'd be where it'd make since there. I'd also like to see a scoundrel tie fighter from the mining guild. Maybe make that one pilotless. Also we could still use the inquisitor Tie from the rebels show be piloted by the healer inquisitor. Also it wouldn't hurt both sabines and the mining guild Tie being pilotless would be cool to see more of those versions of ships in the game aside from more of the droid ships for the Separatists.

Tie Defender came from the TIE Fighter game in the 90's. 

Yes, it did. However, Iden Versio pilots it in Galaxy of Heroes and prior to that had never been associated with piloting a Defender. What I mean is that GOH can take some creative liberties in assigning which characters could pilot certain ships despite previous media not associating them with that ship. However, Ahsoka and Rex have been shown to pilot the Rebels TIE Fighter in the X-Wing Miniatures game but not in the Rebels TV series.