Do we owe Mickey Loomis more credit than given?

Balanced view:-

1. Don't give Loomis undue credit
Loomis doesn't sign up assistant coaches. The head coach does that.

2. Don't blame Loomis unduly
The WLT of a football team cannot be solely ascribed to it's GM. Or indeed any individual. They are key contributors, perhaps even architects, but not a sole determinant of success/failure.