I think Courtois is brilliant but he lacks in the command of his area and I don't mean catching crosses or sweeping but the organisation of his defence & controlling play in front of him.
This is something that Cech & Hart do brilliantly and is an underrated or even un-recognised skill by some people. Some of the best keepers avoid having to block shots by organising the blokes in front of them so well.
Obviously I watch Mingolet a lot and while he's a decent shot stopper (him dealing with crosses scares the crap out of me) he lacks command of the players around him and his distribution is poor.
The keeper is the only player on the field that can generally see everything going but some of them are still to learn how important it is that they use that to their teams advantage.
Edit: Paragraphs the app refuses to do...