Depends on what you want from a manager, someone who has a system which has made him one of the most successful managers in the world, and he’s going to stick to it, or someone who is going to change what made him successful because he’s inherited a bunch of players who may not be good enough to play his way.
For me he needs to play these players his way so he knows who can cope and who can’t, that way he will know what he needs to bring in and what he needs to get rid of.