Has not done anything really spectacular, but was surprisingly disciplined and kept things tidy. Just what we needed, because we already have Matic, Mata and Sanchez to do the creative work. After seeing a host of young players come in here, think that they have made it big and then proceed to fail and be sold (Januzaj, Depay, Cleverly), I think he does have the right attitude to progress.
Also, I disagree that he has not done anything. His positioning was spot on and he gave Matic the confidence to move ahead. He also showed a lot of composure in front of the defenders, intercepting opportunities for counters. With Pogba, Matic has to spend most of the time making up for his Pogba's improper positioning, and can't contribute much in an attacking sense. McTominay kept doing the basic things which sometimes is exactly what is required.