Ball believes the England international has been caught out in defeats to Liverpool and West Ham.
He wrote for the Liverpool Echo: "I’ve said it many times in my column over the years, Jordan Pickford is a fantastic goalkeeper bur his weak spot is on crosses. He very rarely comes out to try and claim them.
"I’m not saying he’s got to come out all the time, but I think his starting point needs to change. He starts on the goal-line then goes backwards.
"He did it for the (Virgil) Van Dijk goal and West Ham’s opener. It happened a couple of times against Spurs.
"I feel his starting point needs to be two or three yards – perhaps even more? – further forward to force the corner-kick taker to deliver the ball a lot deeper into the box. Then it’s got to be an unbelievable header to try and cause us a problem.
"Opponents will know to put the ball on Pickford. He likes getting involved with the opposition."
Everton currently sit 11th on the Premier League table, three points awy from sixth place.