Lehner is awful.  Nine out of ten times he goes behind the net it's a turnover.  He can't, iterally can not stop a shot one-on-one.   
  
He lunges at shots or what he thinks might be shots.  He somehow gets smaller in front of the net when he can't see the puck.  He can not hold a post.  He's actually, when you drill down, literally bad at everything a goalie needs to do.