Joker is an offensive defenseman, who's offense was completely stunted and neutered by Kreuger and converted into a shut-down defender, which was never his thing.
He's not physical enough for the role Kreuger gave him, and Granato has continued to ask of him, so he leaves a lot to be desired in his deployment.
He does a lot of little things well, and he actually is decent at D, but playing with Power, who is an adventure defensively to say the least, he is in over his head.
But you are right, last nights goal was a prime example of the misplaced blame. Jokiharju was exactly where the coaches tell him to be on that play. Had he charged behind the net to challenge, and a wrap around goal or the same pass that happened had occurred, he would have been at fault and been blamed for leaving the crease.
By staying home and guarding for the wrap on the farside of the net, he was doing what they coaches wanted. Power didn't engage, pulled up to guard the other side of the net, but let the pass through, which was his one job to not let happen when he chose to cover the side of the net instead of engaging in a puck battle. Yet somehow Jokiharju is responsible.
Posters are frustrated and want someone to blame. That is natural and why some posters always have to have a whipping boy to focus all of their angst against.