Fair enough, mate. McTominay is a physical midfielder, but I still maintain he's not the best at actually using his physical prowess. Matic and Fellaini were tough as nails. Where defenders went into an aerial duel, Fellaini chested the ball. Matic was sublime at standing tackles. Neither were fast, but Fellaini worked his socks off. McTominay may have good stats when it comes to running, but the eye test says he often jogs about (still covering the distance), and doesn't anticipate the dangers until it's too late.
I always found Fred the better midfielder than McTominay, but both were used incorrectly. Fred was an 8, even an attacking 8, and pretty much every time he was played in that position he did quite well. As a DM, he lacked strength, which caused him to lose so many physical duels. McTominay, however, doesn't get into those duels because he isn't fast enough to recover, and he lacks awareness and anticipation in that role. Closer to the opposition box, he appears to have much better instincts. Obviously, he's also an asset when defending set-pieces.