I think the team that regrets it the most is Chicago because they were the team that actually considered taking him over Williams and now it might come back to haunt them.
They got no scorers on the team except for Rose, who can also run the point forward spot. Curry is their future center, but he is not capable of any type of offensive role, good rebounder and the same goes for Chandler. No offense, but good D and good rebounding. And Crawford wouldn't be complaining for PT if Wagner was up there.