If he wants to come back, I don't really have a problem with it, but I'm not sure if he's going to have the same success that he did when he was last here. He was a 65-70 point winger here when he left, but he didn't perform well in Nashville. If the issue was related to a lack of chemistry, he's not going to be able to pick that back up playing in a center role (Zucker, Coyle, Nino are all gone).
However, I am interested in seeing what he'd be able to accomplish in a center role, since it's been nearly 5 years since he last played the position. Centering him with Fiala could be interesting. I believe the plan is for Kaprizov to play on a separate line than Fiala, but I think they could be dynamic with Granlund.
Kaprizov - Granlund - Fiala
Donato - Staal - Zuccarello
Parise - Ek - Kunin
Foligno - Sturm - Hartman