Severe weaknesses yet you wrote out this entire wall of text and couldn’t point to one specific example of them.. every goalkeeper in the world makes mistakes, few goalkeepers have strengths that by in large nullify them.
He had the most shots saved, most passes and long passes in the Champions League.
Who is easily replacing that?
His weaknesses were commanding of the box and rushing out decisions. But both of those have largely disappeared lately, so the weaknesses were probably down to communication and getting to know his teammates.