How much of Cito Gaston's success in the 90's was his own?
He knew how to handle his stable of talent. The talent alone won't win you championships. (And an exceptional coach might get you a long way, but burn you out in the process - same era in Toronto, look at Pat Burns, he got about 1.5 years of overperformance, and then it fizzled)
Vanney still has his clubhouse with him. He has not burned them out, and that is testament to his management.
I agree, there are always valid criticisms even when you are successful, and we've seen those listed here.