I've heard it both ways, that the game scales the level of mobs to your level. I think this is true for dragons, but not for some missions (the Winterhold missions were really easy at lvl 30). So when I tackled the Mercer Grey quest, it was tough. 3 draugr death lords, other draugrs, and atronachs, as I mentioned.
I wish there was a way to remove quests from your list that you can't complete (because of some other action performed). My list is littered with quests that I can't finish any longer.
I also wish there was a way to save loadouts. Like when I want to do my sneaking attack, I'd like to equip 4 pieces of equipment without having to search my inventory. We should be able to bind keys to a favorites menu for loadouts.