Combining 3 areas of a PS2 world and cutting the other 6 or 7 is not an accomplishment. They legit cared more about DDD's worlds. Traverse Town and The World That Never Was were made significantly larger. Either Disney is responsible for the original content getting gutted or Square is just lazy af. This game is no longer a crossover and is a game for Disney fans not Square or Kingdom Hearts fans.
I know many here kinda consider you the troll of the discussion, but I think that at the very least your first statement makes sense. If this IS all we got for Twilight Town, then damn, it feels like there's barely anything.
But, I also remember how we have seen Sora fighting Nobodies in TT, so it could either be that the "Data Twilight Town" ends up expanding on the original one and giving us many more areas (totally possible), or that we have a "Hercules situation" where during your first visit you fight in a certain area, and once the world is cleared that area fills with NPCs instead.
I really, really can't believe they ignored the Sandlot, the Usual Spot, the Clock Tower and so on, but come on, KH2 is from 2005 and it's no accomplishment at all to merge 3 of its small areas into one on a game for PS4 and Xbox One. There could be more though, so I'm holding out hope.