.....have its overworld still divided into different sections?
I could understand it being on the SNES that limited memory would be an issue of the game's design to necessitate the partitioning of the world into different sectors, but I'd think the capability of the 3DS and its memory today is far past what's required for the entire world to be loaded at once.
Just kind of strikes me as strange. Plants would have to respawn fairly quickly as would enemies, but it'd make it much less disjointed experience from a gameplay perspective. I suspect the reason this wasn't done is because the game would need to be completely reprogrammed from the ground up for this to happen, but that's pure speculation on my part.
Still, all the game's assets are already there so I wouldn't think it'd take that much time. Anyone familiar with programming shed some light on this?