Forget the coaches impact. Even the manager has a limited degree of influence on the outcome.
The success of this team is largely linked to Vladdy; as goes Vladdy so goes the team. So in that respect they are somewhat of a one trick pony heavily reliant on their "superstar". The Yankees are currently in freefall without Judge and have a better roster than the Jays. Vladdy may as well have not played a game all season because his impact is negligible.
Will he come around? Probably but this season seems to be in the crapper barring some miraculous turn around. Perhaps seasons 2027-2039 will yield better results for him.
The bigger question at this point is, does Atkins have the stomach for a fire sale at the end of this month?