There is a concept called fly the plane in emergency while the other pilots troubleshoot or read the manual... single pilot operation of a large airliner is just asking for trouble.... about as good an idea as having two large aircraft fly intercontinential routes so close to each other that the slipstream saves fuel. Its one pilot heart attack away from some kid who played flight simulator to taking over, unless you plan to have some sort of remote control capability so remote pilot from ground can take over
