I think you are correct in the problem but incorrect in the solution.
A coach needs to design a game plan around the players at his disposal. He need to use their strengths and design plans that avoid their weaknesses.
Goodwin has come in and talked about a style that will hold up in finals football. He then has implemented a plan regardless of the players and jettisons players that he doesn’t believe fit his mould, both Dunn and Watts being prime examples. The issue with this is you never get the perfect players and injuries require you adapt etc etc