Your philosophy should not be tied to one formation to the extent you’re incapable of adjusting if the material doesn’t suit the system. Adapting to the squad at your disposal while still being true to your philosophy is part of being a good coach.You don't change your whole philosophy because a bunch of useless cnuts can't perform.
His philosophy and tactics work, hence his success.
Why the feck should he change all that for these useless twats. They are the problem and should be sent packing.