But, I did find the main quest to be short, like 4 quests short.
Not saying i don't like the DLC, I do.
I wouldn't say dissapointed, just surprised at how short it was.
I expected to have encounters with the main enemy many times throughout the dlc.
But you literally fight him the second time you ever see him.
The end made me think to myself "Wait.. that's it?"
The story of this (Much bigger DLC) is actually way shorter than Dawnguards.