>>715897547Grander scale (Keep the key areas, but expand on Hyrule field with more shit, and interconnect them with more exploration. Give us more reason to use Epona.
I saw some art once, where it had Hyrule Town as it is in OOT, but it's all on a scalable hill, with The Temple of Time on one bit and what we have in OOT wrapping around it to the top, but the whole hill was explorable with new stuff too. It looked pretty cool, and would be a good visual in a modern OOT remake. Makes Hyrule look grander.
Orchestrated music and better SFX for immersion.
More heart containers (Maybe 5 like TP) to give new puzzles/discoveries to these expansions.
Update dungeons. They're good in presentation, but are a bit dated nowadays. Later Zeldas did dungeons mostly better. OOT's are more iconic. A remake with touchups is an opportunity to put it on top again.
A couple of new optional dungeons, similar to LADX. You get something worthwhile from them, but you don't have to do them.