The determination is he sucks and only plays well when he has to ty and earn something. Outside of that, he looks unfocused, undisciplined and unmotivated day to day. The worst thing for UPL is to have a situation where he is the clear #1 option, you will get the worst version of him instead of the best, which is the absolute worst case scenario for a guy who you expect to be a franchise Goalie.
Small sample size so far and if it continues over the course of the year that typically will catch up to you by February.