The CL final was absolutely the first time Karius has flapped at long range shots, or had a brainfart in possession. You are absolutely right. Also, you only have a bad game if you make 2 howlers in a game, letting in a save able shot at your near post or parrying a long shot right in front of you is perfectly fine.
It actually gets worse for Karius when you don't look at the CL final, because not only do you see the same weaknesses sans concussion, but you also see poor positioning and reaction speed at the near post.
West Brom 2-2 - made mistakes for both goals, 1st was a poor save that gave the ball on a plate right in front of him and the 2nd was coming out for a set piece that he shouldnt have which left him in no mans land
Man City 4-3 - Sane near post, got his hands to the shot but barely changes its direction. Either poor reactions times or weak hands, difficult to know which one
Roma both legs - flapped at Kolarov's long range shot which hit the bar. Parried the shot by El Sherawy in the second leg on a plate for Dzeko.
Karius has good distribution and is good 1v1. He however, has glaring weaknesses in every other aspect of his game. He will cost Liverpool points because Liverpool do not have Man City levels of ball domination to protect him. He will get tested and will let in several goals that a top goalkeeper wouldnt.
