One of the biggest reasons I haven't yet collected the Sequel Trilogy figures is the lack of decent vehicles. IMO vehicles are a huge part of the magic for 3.75" Star Wars collecting, and the ST really doesn't have anything there. If Poe had an XWing in the same scale as the larger OT Xwings and the TIE fighters were a decent scale like the large wing TIEs, I would bite the bullet.
Vader's TIE though...I need me that thing. And I agree...ground up.
Though on the topic of OT starfighters, Vader's TIE, an all new large YWing and an all new Bwing would be a perfect finish. I think I could call the OT done at that point, at least for onscreen representation.
Sure, I'd love an Imperial Shuttle with a better interior, but I can live with what I have.