The Problem of the "Mystery of Scoggins" is the title is tied to an Event, instead of been tied of what to do. Puzzle Agent is tied, in a way, to Nelson. And Nelson can go to other places instead of only Scoggins.
In a way, they are doing the title to become a Series instead of just a one shot. Which says a lot about those guys
(By the way, I don't really like the name either, but I can understand why it's there. Appart, we become used to call it "The Mystery of Scoggins" and a change is always weird at first. If you still dislike the name after a month, we can talk about that. But now it's way too soon. In fact, I'm starting to become neutral about the name.)