LaRousse City was my profile location on PC for at least the first 4 years I was here (and on and off since then), so I definitely would've been on board to see it added to ORAS. Maybe not in place of another city, but if HGSS and B2W2 can add cities to the existing geography, I don't see why ORAS couldn't too. Plus, it would make the Pokemon version of my hometown game canon, which would be cool by me!
And while they aren't cities per se, I think it was a missed opportunity to not include the Orange Islands in the Kanto remakes. Sure, the Sevii Islands weren't bad, but I was a little disappointed that they had no existing backstory like the Orange Islands did.
Oh, and I'm going to move this over to Pokemon Gaming Central for you, since while it pulls from other parts of the franchise, it relates directly to the games.
MOVED.
Ya it would've been cool if they were able to keep all of the existing cities, and then add LaRousse City. I think the moving sidewalks could have been amazing in ORAS.