They might do that, though i'd be afraid of just how much they'd ask for Plus. Something tells me we'll see a hike in our current premium price soon considering everything ever is going up in price(some for no reason other than "well everybody else is doing it"). I hope i'm wrong.
If Plus will have larger houses or more LI, we likely won't see it for a good while as they're not yet done with the normal homes yet. There would have to be less homes on a region, so either even more cloned regions on those, or a heck of a lot more work for our poor Moles.