... just make the core story the same but update with new maps, challenges...
You mean more fetch quests and climbing towers to reveal objectives? -.-
Remakes seem to come in two brands:
You have the 'HD Remake' where apparently up scaling a game without improving on the engine is sufficient cause to call it a remake.
Or the spiritual remake/origin where the core game is basically torn to shreds and given an overhaul by someone who's strings are clearly pulled by an accountant (*Cough* Episodic FF7 *Cough*).
It seems the one thing everyone wants that no company wants to provide is the same game (take Morrowind for example), but any bugs are ironed out and the engine/textures are updated. That doesn't mean pasting it over the top of a new engine and losing original features (Elder Scrolls without Jump spell is not Elder Scrolls)
I don't want new quests but if you insist, they better not affect the damn story. Use them to flesh out existing character back stories.
I don't want a new UI layout, just make it prettier
I don't want my conversation choices defined by a freaking analog stick wheel
No god damn tower/map/objective reveals
BUT clearly that's not what makes them money so this is all wishful thinking