It may or may not be right but I get the feeling he is kind of a cat chasing a laser pointer. Offensive oriented bigs who can't shoot have to be like Sabonis, Sengun good to get the big $$$$
I could be out of the loop, but I don't think there has been the same kind of tension between Duren/Pistons as there is Kessler/Jazz. Usually these things get done when both sides like each other. OTOH, I think DET has a better case than we do as far as saving cap space for next summer. If Duren was really asking for "well north of $30M a year" DET was wise to let him prove it.
I think the sharper teams will value Kessler > Duren. But there's definitely going to be some that prefer Duren.
DET is another team that will be out of the honeymoon phase soon and will have to meet expectations.