I like using the map overlap in the middle of my screen throughout my play. There are way too many things that cause it to automatically turn off again so I find myself having to toggle it on sometimes multiple times a minute.

Currently it's almost treated like a "window", so if you open up your inventory, character sheet, active skills, gates of fate etc, it turns off the map overlay.

It should stay on unless the player turns it off, or if a cut scene or important game sequence is playing.