Jose was able to attract Pogba and instill a hardness and context into the players not done by Moyes or LVG.
He tested the players mentally and while it was a bit toxic at times, there are players who have benefited. Also, Carrick and McKenna were introduced under Jose no matter the influence of the board/Woody on that respect.
Lindelof, Dalot, Shaw, Pogba, Matic, McTominay, Martial, Rashford, Lingard, Young, Lukaku all had significant tests and learnings under Jose...for the better. While Jose limited the players, they gained perspective of the game under Jose that has served as a part of their foundation which has lead to greener pastures under Ole thus far.
United also had a better mentality and spirit under Jose compared to Moyes and LVG. It has obviously been elevated to levels under Ole that are closer to Fergie's Era.