Seems to be a lot of over reaction to Dunn's first game in charge, he has already brought 2 new players with the promise of more, shipped out guys who in his opinion are not ready yet / not good enough, it appears he is being decisive.
Dunn's first objective is to stop the rot then he can gradually look to change things alongside the new players bedding in.
The new coach it will take time for his ethos to be taken on board.
Let's be positive