Something to look at in a potential Mike Zimmer hire is his usage of Anthony Barr in Minnesota. In Minnesota, Zimmer used Barr primarily as a LB, but would put his hand in the dirt on some passing downs. There are some similarities in skill set between Parsons and a young Anthony Barr. Parsons was used in a similar way as a rookie, when he wasnt used as a full time DE (remember Parsons as a pass rusher was pretty much an accident)
If Zimmer is the hire, is there a chance we go back to using Parsons more as a LB on running downs. That would be my hope, as I don't see any point in playing him as a DE on running downs