Personally i think it would be interesting if there was no fog of war. I feel
the fog of war (black areas) makes the game EASIER. You will almost always know where you've walked before and it makes it easy to find almost every little spell cave/rock/tree/wishing well on the map. Like morrowind where everything was visible it easily led to the situtation where you would walk right past dungeons and entrances just a screen out of the way and never know about it.
So if they want to emphasise exploration i believe the fog of war must go completely. I saw maps of the sewers in the game, but the diary-maps made those pretty useless, would be interesting if you would have to aquire such maps in the game before it will be viewable on your diary. Because alot of this game is about exploring but the easyness of it makes you rather pick fighting skills than exploration skills.
