I disagree.
He had a superb season last year.
My concerns, which are shared by many on this board, evidently, suggest he is performing well below his usual standards. He must believe he is undroppable as he has started in every game against Scunthorpe in the FA Cup since Hiddink arrived, despite some very insipid performances. If we had a braver manager than Hiddink, and/or someone who wouldn't accept second-rate performances, Courtois would be one of many rotting on the bench at present.