Cons: The plot "mysteries", of course, aren't really if you have any familiarity with the comics, and we do get more of Dick than his role in things would demand — he's somewhat (although not exclusively) the viewers' main entry point.
Pros: Dick's rather delightful (comics!Jason: "Unlike you, Dick, I never was the *good* son". Titans!Dick, at age barely-old-enough-to-see-over-the-steeri
There's a completely comedic version of this just in our peripheral vision, and if, I think, that's never where this show's going to go, the fanfic practically writes itself.