Assuming the game will get fixed and other problems are addressed, one feature that would be cool is a weather and time of day toggle filter on the map. It would always kind of bug me when porting into a zone and it is raining or dark outside.
The assets are already in the game for green/yellow/red highlighted areas, just one more thing I thing would help make ESO more unique.
Also why are player maps still a weird shade of yellow? Give us the color detailed maps too pls!