I think DDG communication, ability to deal with crosses and his decision making is his biggest drawbacks. He’s asked to do a bit more for Spain and struggles to work with the system they play.
For me he’s an out and out shot stopper. A phenomenal one and the best in the planet at stopping shots. But as a complete package, I think he lacks.
DDG is certainly low on confidence at the moment which doesn’t help, but I’ve always thought that he’s a better goal keeper when acting on pure instinct as opposed to when he has time to make a decision (i.e. whether to come out for a cross etc)