I thought the idea was great. Leave it to Mark Waid to ruin it by using it as some sort of underdeveloped scheme to reveal Batman's identity to everyone--not to mention his typically poor dialogue and narrative.
If I ever got ahold of the DCU continuum, I'd revisit ToB and take the story to its logical conclusion: Batman only joined the JLA to spy and develop deterrents to potential threats to Gotham, and not because he agreed with it.
