The problem is We have appointed washed up managers who have failed to adapt to the tactics on the strengths of our players and that included Herrera as well. He was always a proactive pressing machine in the middle whilst both Lvg and Mourinho misused him with tactics which included little pressing in the middle resulting in him being forced to do a job of a defensive minded midfielder deep in our own half and expecting him to hold the play, yet he has given his absolute best and shown the hard work while adapting to what ever the manager wanted him to do. His passing vision too can be much more threatening near the box, but he always is forced to do a defensive job in our own half while not being the best in controlling the tempo of the game.
We can't press high still in this midfeild as pogba is very lethargic without the ball and matic had lost all of his legs and engine which could make us being proactive pressing team and yet we are here not giving him enough credit he deserves of holding this midfield together and adapting to others around him.
Imagine being Herrera who puts all the effort and workrate in this team while the likes of Pogba Martial Lukaku Matic Mata can just jog on without putting in a shift some of them who are way younger to Herrera, earning more than him in the team while they are riding on the platform and whose core contribution is from Herrera being a unselfish team man. The performances of those players since Herrera is out is there to see for itself. Doesn't he deserve to be paid well in his 30's which could be his last big contract according to the position in this dressing room?
Our managers kept misusing him all this time, and the blame shouldn't lie on herrera's door of not being that change in the team when others earning more than him haven't been that change themselves.