Point is Shaka did what Jack did before....
Made the most of the opportunity when it was presented to him.
This is WC, not no charity sweat.
The amount of bullet and save Shaka make more than qualifies him for the job between the post.
Remember Jack was injured.......he simply lost his place at a bad time.
Lastly If you compare jack to Shaka in all aspects of goalkeeping he comes second...Communication, Crosses, Command of area, throws, kicking, , movement off the line, Clean takes, reading of the game etc.
He is only better at shot stopping....and Shaka has shown us in the past two games he is more than adequate.
Jack also punches the ball directly to the opposition or gives away needless corners. He very rarely makes a clean catch or save.
Leave Shaka in the post....Besides is only Classic he does collect.