Mitts has elevated his game this year.I agree with the general sentiment, but there is a rather big difference between MItts and Olofsson in regard to defensive responsibility, and board work.
However, if you step back...he has pretty average production.
I don't have a problem keeping him (much rather move Olofsson at this point), but I would have a problem with a long (over 3 year) extension, especially given the volume of draft capital we've spent on forwards.