For me he is absolutely the right man for the job. He's never managed at a club with a combination of mediocre/inconsistent (Young) attacking talent, especially one which is expected to be challenging for the title. We currently stand in my eyes with;
Martial - Potentially world class - Inconsistent.
Miki - Our only truly world class attacking midfielder.
Mata - Injured
Rashford - more often than not played out on the wing - Potentially world class/decision making - Inconsistent.
Zlatan - World class.
Lingard - Decent squad player, not even close to world class level. A level below what's required for the title, at least in a Mourinho team.
Young - Squad player, past the peak of his powers as a winger, which were never close to being the best in the first place.
Rooney - Absolute dross, slow, cumbersome. Only value is as a set piece taker.
When you compare this to his Chelsea/Madrid/Porto/Inter attackers, the difference is night and day.
Robben, Drogba, Hazard, Willian, Lampard, Ronaldo, Benzema etc etc
The point is, his teams have always been successful because they've had the right combination of pace and consistent, proven creative players, usually surrounding a target man. I'm confident that as soon as Jose signs the right attacking players in the summer to compliment Zlatan and Miki then we'll be a force to be reckoned with again. He's sorted the defence out in one season, now he's fully aware of the limits of our attack, be they down to potential, or just limited players. He's ruthless and won't hesitate to improve us in the summer.