Is it possible that the production model (with the new art, etc.) was being worked on before the prototype was even revealed? Everyone assumes Jack is making these changes due to the response from the unveiling. Maybe the proposed changes were already being made in the prototype 2.0 version. (for lack of a better name)
I'm not suggesting the prototype was a ruse, but maybe Jack has kept his cards closer to the vest than we realize. At least I hope that is the case.