I'm sure there is a gameplan, but the players are terrified of making mistakes they have lost all confidence when they have the footy.
I don't usually support sacking a coach mid year, but if Mick stays until the end of the year he might do a whole lot more damage.
You are right that there is a game plan and that the players have lost all confidence when they have the footy. That is because the game plan, whatever it is, is rubbish. The players have lost all confidence when they don't have the footy too.
I disagree MM will do any significant long term damage from here on until the end of the season. MM was never the Messiah but nor is he the Devil.