Those things could have made the game alot more enjoyable in my opinion because instead of rushing through this ruin that looks the same to me to get something on a fetch mission... I'd take it all in, explore behind every corner everytime, because after the hundreth dungeon I just don't care to do that, I want to get in and get out because I feel like I've seen it all before
From this statement you're basically admitting that the thing that ruins the dungeons in Skyrim for you is the pace at which you feel inclined to complete them, I don't think that's got
anything to do with the development of the game and its interior dungeon layout and lore content.
But when they sat down ad created the Falmor and created their lore as first being Snow Elves it should have been natural to say... Well where did the Snow Elves live before they were driven underground, see what I mean... Thats like why do we have Dwarven ruins? Becvause there was Dwarves before and thats where they lived.
Again, something that is implanted into the lore and can be revealed later. What is your point, that dungeons are too samey and bore you or that there isn't enough story behind why the inhabitants are there, or because you just don't like a little bit of mystery?