Old World Blues does fetch quests right though, since it basically just uses them as an excuse to make you explore interesting places with interesting stories and designs to them.
Compared to the main game, which was hit-and-miss with that and could be irritating (the BoS quest-line was incredibly long and sent you in some pretty irritating places, Return to Sender sent you to ranger station hnghr...) or Honest Hearts (lots of map marks to explore but pretty barren overall, I felt) and it's definitely better. It also has some genuinely creative stuff like the testing facilities, and many of the quests are optional.
Also, but this is something it shares with Honest Hearts, the map design is a lot better than the Mojave.
The writing though.. I simply don't feel it was particularly good. Sure, there are chuckle-worthy lines and it ties well into the other DLCs, but it's a thin narrative that relies too much on its weak comedic attempts. I think it's telling that the best narrative of the DLC comes from its ties to Dead Money and Lonesome Road.