During play after revealing parts of the map (Mini map / Overlay map), I think when returning back to an area that you have already played through, the map should be filled out with what you have already seen and not make the player have to “Discover” the map again. Maybe if the game was restarted it would be fine to rediscover areas, but in the same instance it would be nice to have it filled out.
Also I think in the “Town Hubs” the map should just be revealed since theres no hostile enemies in these areas. Wondering what others would feel about this suggestion if it was not suggested already.