The actual characters are fine. Even the villain line-up was good. But chopping up Amazo's legs with a bat-laser was not exactly mind-blowing. (To stop him from running as fast as the Flash! Never mind Amazo could have run out of the way quicker that Batman could have pressed the on-button.)
Superman should have used heat vision to sever Grundy's head. Or have Arsenal take his eyes out with grenade arrows. Or have GL drop Amazo into the orbit of Antares (reputedly the star Krypton once circled) using the power ring to open a portal through space. Where was the "you fuck with one of us and we'll fuck with you" clincher?
Red Tornado should have actually died. Amazo should have replaced him in the line-up. I would have bought the tpb if that had happened.