Kemba went downhill fast. As recently as Kyrie's last season here he was playing at an all star level and was pretty durable throughout his career. Jordan obviously knew what he was doing in not signing him to an extension.
Brad, to his credit, made dumping Kemba his first priority when he took over Danny's job.
I feel bad for Kemba because he can't do it anymore. But he's also had a great career and made a whole bunch of cash.