They should also remove the names that appear on NPCs when you talk up to them, so that way the only way you can know who they are is if you ask them
There's a mod for that.
and recognize their appearance if you want to talk to them again.
, but not for that.
They should change their clothes everyday to make it harder to remember.
There's one for that, though.
They should also remove the labels on the entrances to caves, so you don't know if you found the right one for a quest, thus forcing you to explore that cave for an hour, searching for an item that's not there.
I don't think I've seen this one. Remove the compass marker, yes, but not remove the cave's name entirely.