Next season he should be the 19th-20th most paid center in the league . Is he a top 20 center in the league yet tho? If his development is stagnant (unlikely, he is a smart guy that will put in the work I'm sure to improve), his contract will be questionable.
But I think Suz has 65-70 points potential, elite in his own end so if his development follows a normal curve, it shouldn't turn to be bad. But if he doesn't improve from his current form, he will be overpaid by 1.5-2M$, since 1B/2A C are usually paid around 5.5-6M$ (see Larkin, Reinhart, Scheifle, Monahan, Forsberg, Scheen, Staal, Hertl, etc.) .