I think it might impact the team in a more positive way, he seems to have improved the performances of the players around him in a key area of the pitch, in such a short space of time - which just tells us about how influential he can be moving forward.
Not sure it would affect Maguire tbh, he seems quite headstrong and I don't think we'd get the same reaction as say, Martial when the #9 shirt was taken away from him. I don't think he can influence the game from CB in the same way a midfielder can.
When you think of influential captains they've mostly been midfielders: Keane, Robson, Vieira, Gerrard.
Anyway, just my two cents.