How is one of the best faceoff players in the league "potentially more of a winger"?
Maybe it's bc I'm a Sharks fan but I don't think of centers as being correlated with taking faceoffs. Both Pavelski and Hertl, who were Thornton's typical wingers, were better than Thornton at FOs last season. Pavs, who's been a winger for years, takes the most faceoffs. For quite a while Ward, who never plays center, was one of our best at FOs but he's not now. (Still better than Couture and about the same as Tierney.) Couture, who always plays center, is one of our worst face-off guys (the worst this season) while Marleau, who plays more at wing, is above average.
You have your best FO guy take face-offs (or, e.g., based on handedness) whether he's a center of a winger.