JJJ is just 26 years old. He's having a down year and he was probably overrated in the first place, so I think it's totally fair to question him. But I also think it's fair to question if/how he could fall off so much based on one season. He's only one year removed from being an all star and it doesn't seem like this MEM situation is the greatest.
This summer would have been an awesome buy low time for any team trading for Lauri if they were able to pull it off. Not saying JJJ is guaranteed to bounce back in the same way, but it is possible for a player to bounce back after a bad year. If MEM is pulling an Ainge and expecting premium value as if he never fell off than it's a no go. But if MEM wants to go another direction and he's on the cheaper side I am intrigued. If we trade for JJJ, it likely means that WK is a goner though. Too much future salary.