"3. Someone other than Libby has now been fingered as the original source of the leak, undermining Fitz's comments at the press conference and raising questions about what else he might have missed."
I tell you what it also raises. It raises the real point that Fitzgerald did a very botched job, that he would miss such an important element.
And it suggests that even after all this time it was more important for him to get this indictment (any indictment) out before the elections -- when they would do the most good.
One could also argue that the indictment was just a tool for Fitz to continue getting a paycheck. No indictment, then no more SP and he has to go back to earning an honest living.