You've got two schools of football, pragmatic and progressive.
Jose Mourinho is a pragmatic manager,
David Moyes was a pragmatic manager. They see their job as maximising the points given the options they have available and spend a lot of time thinking about the opposition.
Pep Guardiola is a progressive manager, Roberto Martinez was a progressive manager. They play the same way whoever they are up against.
A good pragmatist will beat an average progressive manager. As we saw in Roberto's second and third seasons teams knew how we'd play and realised if they stayed deep at Goodison we couldn't break them down.
However a good progressive manager with financial backing and a long term plan is the only way we'll make this club into one that wins trophies.
We need a plan from top to bottom. Some sort of mission statement along these lines:
Everton are the school of science. We are looking to continually improve every aspect of our club, by recruiting the best and developing our own staff. Intellectual laziness has no place at Everton - we think things through, decisions are made with the best available evidence and we back our decisions with all the resources they require. On the pitch we play aggressive, attacking football, we aim to win games and believe in the style of football we play. This will be the best football club to work for in the world, and the best to support.