What do you question about his leadership ability in particular?
Mostly his credibility. At one time I believed he had a promising career but he has failed to deliver the goods. A real leader brings with him the ability to bring about change for the better. Jose doesn't make those around him better as you can see the teams winning% is the same with him or without him. As a leader on a young team they have to trust that he understands their individual abilities and will compliment and reinforce their skills. The tandem of JC and AB doesn't instill the problems for opposing teams that their most optimistic fans think and a change has to be made.