As you sort of alluded to, my problem with a 28mm (or thereabouts) scale minis game is basically "been there, done that." Could maybe be done BETTER, but I'd still like to see something different. Tactical Ground is the only thing that hasn't been tackled yet, and I really think there's a place for it.
It IS worth pointing out that there are more options for the Rebel camp, if you and FFG are willing to accept a bit of EU: Remember the West End Games D6 RPG? The Rebel Alliance Sourcebook offers up the Freerunner, "Tramp Shuttle" armed landspeeder, ULAV, and Heavy Tracker. None of these are up to the threat level of an AT-AT or Juggernaut, but they DO mean the Rebel Scum aren't confined to airspeeders and hairy ponies.
And, of course, there's the Clone Wars. Yep, I think that would be fun.