I wonder how they would have handled the route split in EO3U's story mode? If I remember right, weren't some characters from both the first two game's parties supposed to show up? It'd have been sick if they each took a different side of the conflict and you had to fight whichever ones you went against. Of course they'd have all gotten jolly with each other on the 3rd route, but at least they could milk the conflict more in the two fun routes.
Then again, given how the first two games treated the story parties more kindly, letting them save people who couldn't be saved in classic, they might've just taken the easy way and had them automatically make the "right" choice...but we'll never know, haha!