Good shot stopper is a kindness, all goalies are good shot stoppers, that's why they play there, there are other rudiments for being a keeper that are important, but good shot stopper is where your goalie career starts, who was the last marginal keeper that was not a good shot stopper? Stevie Woods could make saves all day but his awareness and concentration were honking.
Is Ox an upgrade? Partially, we upgraded our defenders too.