I don't really see any comparison between him and Alonso/Carrick, both were cultured Deep lying playmakers who used the ball superbly in setting the tempo for the team, they were also more mobile than Matic who is practically a statue at this point.
He might be built like Ibra but just like Ibra his mobility is poor and unlike Ibra he's not athletic so he can't make up for it, he moves like a tanker and can't cover the ground to protect a back 4 anymore, he'd just be another grotesque waste of money IMO and another player whose limitations force Herrera and Pogba to curtail their game to operate as legs for someone else.