I have had no problems with the new doors either technical or procedural - especially now that we have the camera.
I agree that this is an article probably originated by one of the many people that were pushing their 'instant answer' to the problem of flight deck break-in immediately after 9/11. There was everything being pushed around the marketplace ranging from kevlar screens to replacement bulkheads.
Thankfully the CnD products for Boeing were well constructed and trouble free. After initial problems with noise and strikers on the Airbus doors their reliability appears to be improving.
Anne