and then, what are they left with? assassination/killing spree (which is essentially the same thing as a FedEx-quest, because you're required to bring something to the quest-giver). it's not a matter of the kind of quests, but how they're done. and, in my opinion, this particular one is an example of a very well thought-out quest. you don't just have to run there and back, you have to visit all of the locations first, possibly exploring their surroundings. not to mention that some of the stations had their very own quests.
it took me a lot of time to complete it. I approached it as bonus xp for exploring places I would've visited anyway. but now I had a purpose. it was a good way to make the ranger stations useful (to counter the FO3's "a lot of places don't have anything, they're just there for the numbers" thing).
EDIT: ah, C got there first