I think footballers need the sense of insecurity to keep performing well. You have to know that if you fuck up there's a chance you could get dropped.
I don't think Rhys feels the pressure from Book, or from his manager. I like Rhys as a keeper, but I do feel that he has no confidence on his defence and the defence have no real confidence in him. Saying that i don't believe the players have confidence in any of their colleagues, including their manager.
I think that he's good at saving shots and fucking useless at kicking, calling, catching, organising...