its hard to comprehend how something so trivial cannot be coached into a top class goalkeeper. maybe it was more to do with doing this under pressure, maybe he just didnt have the composure. skill/technique is something that can be drilled into a player given enough effort and time, but composure is something trickier to master.
i still believe it was most probably a combination of all that we have mentioned, when added up they became too much to persevere with for Pep.
3 weeks ago i thought we had a top class goalkeeper who would be the cornerstone of the squad, but now it looks like he is a square peg not fitting into a round hole. he's still top class, unfortunately just not in our system :(