Well... there's always another possibility as to the nature of this particular area. Here's a good Youtube video showing the town:
The most notable thing about the town, to me, is that the reason it's so far from Cartanica is that it's near the water. Perhaps instead of simply allowing the player to drive from Cartanica to the dungeon (which would be a nice addition in and of itself), BD2 intends to let the player visit the first town that Noct and co. reach on the Niflheim continent.
I feel like, apart from the Cartanica loading screen, the game didn't do a bad job of keeping the bros' travel through the Niflheim continent on-screen. You're on a train most of the time, of course, but that's not the same as being teleported from one location to another.
Here's what I would consider most useful:
1) Update the Leviathan fight to include the mini-dungeon from the Pocket Edition.
2) Show the boat ride between Altissia and the first town in Niflheim, and let Noct explore the first town in Niflheim a little bit.
3) Provide a reasonable-sized open-world chunk around Cartanica and its dungeon that the bros can traverse in the Regalia.
4) Update Chapter 12 to include the mini-dungeon from the Pocket Edition.
5) Implement Chapter 13:2 in-line with Chapter 13 proper.
6) Provide a reasonable-sized open-world chunk around World of Ruin Hammerhead (extending into Insomnia) that the bros can traverse in the Regalia/by riding Chocobos.
If they pulled all of that off, of course, it'd be a transformation the like of which defies easy comparison. In Kingdom Hearts terms, it'd be more like a Re: than a Final Mix. XD;
True, though I thought they sort of doubled down on it in the Comrades cutscene, which they probably wouldn't have done if they intended to change it. Having the guys get called away (most conveniently, perhaps, in an attempt to find parts to repair the Regalia?) seems like it'd be the easier solution.
A more heartfelt reunion would definitely be appreciated, I agree... and having Noct show up just in time to help his bros fight off overwhelming odds could be a perfect means by which to affect that.