Probably my favourite world structure, is interactive world map with random encounters and smaller individual maps - So Fallout1&2, Arcanum, Kingmaker.
I absolutely don't mind larger, single maps as long as they are taken advantage off. I expressed my
dislike regaring some the map design of D:OS2 so I will skip that.
One think to remember is that maps worked a bit differently in D:OS1 and D:OS2. In D:OS2 you couldn't come back after finishing an area, but in D:OS1 you could. Difficult to say what Larian will do in BG3. Perhaps option "C"? For example is Underdark part of the same map as the surface (clearly party can exist in both at the same time, so yes?)? When we enter BG will we be confined to the city ala Arxs or will there be a regular travel between different large zones.