I won't fully blame Mourinho for yesterday's performance. However, he needs to try to develop more players so that we have more options in midfield, wings etc.
He needs to stop picking Matic,Mkhi,Herrera as our midfield combination for the umpteenth time as playing them again and again wont' suddenly make them great. They don't play well together. They never will and we have seen it from the performances. We lost against Huddersfield, struggled against Benfica, won against Tottenham when De Gea bypassed this midfield and went straight to Lukaku and have just lost to Chelsea.
What can he do? He needs to pick a few players from the youth setup. Not an assuring idea but that is his only hope. He needs to then develop these players by playing them whenever we are a few goals up, or have an easy league cup tie, or in matches like the coming Champions League ones. All he is doing is playing Martial and Lingard in such matches and one or two defenders are rotated. Martial needs to be in the starting line up and Lingard is just Lingard.
He has shown signs of doing this with McTominay. He needs to do it with atleast one more player. I have accepted that we won't be that great as shown by our form in the beginning matches. We just don't have the players to keep playing that well. However, if Mourinho gets lucky with a young player then we might just be able to pull something off.
We are in the same situation Van Gaal found himself in, in his last season here. He had sold a lot of players and found himself without options. Mourinho is in a similar situation. Transfer activity was very inadequate and we find ourselves desperately short of options. He has to take a risk with some youth. We can't depend on Pogba to stay fit for the entire season and play rubbish when he is not there.