I think you're all being too harsh.
The murder mystery ended up being the backdrop to events that will affect the interaction of DC characters for years to come.
It was the unresolved issues that will set in motion plot lines for any number of titles.
A new Capt "Zoomerang", a new and lethal Dr Light, a new Calculator, a devasted ELongated Man, and most important of all, extreme tension between Batman and his former friends in the JLA. That's not bad coming out of one series - a lot more than Legends, Armageddon 1000, Invasion or any other number of ridiculous cross over events that have taken place over the past 20 years have achieved.
With all of this, who cares, ultimately, that Jean was responsible? There is too much else to contemplate.
