Coaches show their worth when things aren't perfect. When they need to rely on their ability to adapt and strategize around things like injuries, team deficiencies, etc is what separates the good coaches from the bad. Anyone can win with elite talent, only the good ones can win without it.
This is where Cassidy fails for me. He can't coach around adversity. He doesnt have the ability to come up with a game plan to maximize what he's given, which goes back to the big complaint folks have had. He is not a good Xs and Os coach.
The good ones find a way to win, Bruce doesn't