I have barely scratched the surface of the dungeons in the vanilla game and I come accross one every 5 minutes.

Now, I understand Bethesda put a lot of effort into crafting better designed dungeons and they will need something for their designers to do in DLC - but those people can work on designing houses, towns and other above-ground structures.

I would really love for DLC to add more above-ground content, with more quests within civil areas that require lots of talking and tracking NPC routines and going to Bars and Taverns.

I kind of get lonely just grinding through the dungeons, even though some are quite interesting!

Take a follower....

I know how you feel. Its almost like Skyrim is a dungeon crawler than a RPG. About 70% of the quests in the game revolve around your character going into some dungeon to retrieve a particular item. It gets really repetitive and boring.

Well, if there was more Banter with people like Lyda I might, but they cramp my style, set off traps and alert enemies ):Also, in tight dungeons, followers are a hassle in doorways. Don't get me wrong, I love the fact there are tonnes of dungeons, we just don't need anymore

And just as OP said, a bit lonely.
Of course you can take follower with you, but not everyone want to be followed. For RP purpose I mean.

Or buy a dog.

Or summon Daedra.

This. A dog is much better than a follower in my opinion, and they can eat a bandit alive.

Or raise the dead . . .

but im afraid they will die and then i be for ever alone