Perhaps the actual 'coaching' isn't as important as the decision what to coach and the motivation of those being coached. In the end, leadership is what motivates, not management. Put the wrong personality in charge of a group of men and their morale will quickly be undermined.
Whoever is chosen as our next Manager, it's essential he has the character and leadership qualities to get the last drop out of those he leads. We've all seen in recent weeks that, whatever else he might have done wrong, Beale was a fundamentally weak and needy personality. That's why he failed.