I'm just curious as to what these "mistakes" are. I could care less about eyecandy if they're about to unload a dump worse than Oblivion's Radiant AI on us.
I think the mistakes could be that, with too much Radiant Story everywhere, everything feels the same, and you see a repetetive pattern, or something like that.
That's my guess. Or it could be like leveling scaling, you get a challenge for you, and with too much challenges all the time... the game stops being fun.
Or it could be like eventually every nearby dungeon was raided before, so the game crashed or put the enemy in a house or something