Why is there no "new flight deck option" for the A320 series?
While Airbus is selling a "new engine option" for the A320 series all these shiny NEO birds come with a flight deck that would not startle a pilot rated in the first A320 delivered over 30 years ago. There have been some small changes to the flight guidance panel and FMS but while the screens have evolved from CRT to LCD the overall impression is quite "retro" compared to the huge screens on the A350, A220 and E2-Jets, let alone business jets with their quickly evolving flight decks.
I assume this is mainly a sacrifice on the altar of commonality but given the fact that CCQ is allowed between A320 and A350 can't be a show-stopper. High costs of certification could be an issue but there is certification for the A350.
Any ideas why Airbus isn't offering an A350-style flight deck as a customer option for the A320 series, something which might be of interest to airlines using A320/350 CCQ?