First off, SO excited they are bringing this back, even though I technically don't need it (have a copy of the original Rulebook, plus a PDF of the Sourcebook).
Second, if they either release any further supplements (which seems unlikely but particularly the Rules Companion), I would say: Ignore the "Scale" rules (i.e. Capital, Fighter, Walker, Speeder, etc.). They're among the least-elegant additions to the rules. Your PCs will *never* command a capital ship (or, at least, if they do, don't try to map out the precise roll-by-roll rules for it). If they need to attack a Star Destroyer as part of a bunch of fighters, have them just make some extra Starship Piloting checks to avoid screening fire, then a moderate Gunnery check to, say, take out the shield generator. *That* is a better way to work out fighter-vs-capital combat than is trying to cram them into the same rules environment.