The Manager is fully entitle to play who he likes, that is why he is the manager, he will live and die by those decisions.
My problem is why did we spend the only money we had for the summer (and we knew at that stage that is was the only money) on someone who was not a significant improvement on what we had? Surely the money could have been better invested elsewhere and just take a chance putting one of the U23 keepers on the bench for the year.