Auxilium
In my opinion..
I could careless what you do in your game. He's alive and well in mine. And one of the best companions in the game IMO.
Lol, taking it to the heart.
Anyways, onto the main topic. The story is Skyrim was very well put together I think, I only played Oblivion for a little bit before I got into other games but I did do some of the quests in the DB, while the DB in Oblivion did seem like a dangerous entity that most people feared, the story just wasn't put together as well, but remember I only played it for a couple quests.
I didn't see the betrayal coming to be honest in Skyrim's DB quests. The Emperor quest was fun and so was the bride quest.