The ARC-170's scale is gonna be a huge issue to me. No excuse not doing it to-scale if they're willing to make the Gunship from last year.
I'm fearful of any scale cutbacks honestly.
The Mustafar playset I'm intrigued with. Sets can be something Hasbro could do incredibly well without compromising accuracy/scale. They need an interlocking (and stackable, in situations) feature but, this could be an area that they excel in.
Vehicles are another story... While I love when Hasbro does it right (TIE Bomber, Landspeeder), I am so let down when they do it wrong (TIE Fighter, X-Wing, Snowspeeder, Y-Wing, AT-ST)... The vehicles, in some sense, are like the 12" figures. They get the shaft as far as the effort put into them and how competitive they are on the shelf next to other toylines.
Most of my top resculpts are classic trilogy vehicles, but the ARC-170's a ship that (if done poorly) I'm sure is gonna make my resculpt list. To me, it should be to-scale, no pack-ins, and no more than $40 given how many outlets are sure to carry it and its assumed high production #'s.
When you walk into a store and there's a to-scale ME-109, Mustang, or P-38, and then a dinky starfighter next to it, it's a disappointment. Hasbro needs to "wow!" with this ship in my opinion. And they can given that not only are they gonna be pushing it through a lot of retailers and making a ton of them, but there's inevitable repaint options for it later.