While I still don't think Meltzer handled the autopsy results correctly, I'm willing to move on.
Some interesting issues being set up here.
First, as other posters have noted, having Dr. L's, but no the JLA's, memories of that night include Batman is...iinteresting. It could be an artists' mistake, it could be Dr. L remembering it incorrectly, or it could be that Bruce is screwing with his teammates again.
I thought the Ralph-Sue incident being the reason for the Hawkman-GA feud was a little off. Based on my knowledge of silver age JLA timelines, Ollie and Hawkman were fueding long before Z joined the league. I guess that is a retcon, however and I'll have to live with.
Wally's indignance at the league mindwiping other villains to keep their identies a secret is intriguing. DIdn't Wally have the Spectre mindwarp the whole WORLD recently? It seems a little hypocritical of Wally, at least right now.
The mindwiping of other villians didn't really bother me. Meltzer did a nice job of showing how it just seemed the thing to do until Dr. Ls went bad. Furthermore, Meltzer obviously is aware that such things, hypnotism, mindwipes, etc., were standard issue in the silver age (hell, Clark even did it to Lois in SUperman 2, remember?).
I am getting the distinct impression that this book is going to end with a mind wipe of a LOT of people, however. THere are too many issues about the ethics of same being discussed...foreshadowing, etc. And, if this book really has long term implications for DC as promised, I suspect that at least one of the victims will be a certain headstrong female reporter.