For what it’s worth as an operator of the type, the closer system-functionality matches reality the happier I am. Especially regarding the FMC and autopilot. The more I can replicate what I do in the real aircraft, the more I can develop myself and turn up to work a better pilot. You almost can’t put a price on that, however I would happily pay a large premium for an aircraft that has absolutely no cabin or external imagery yet has system functionality and manipulations that perform exactly as the real aircraft does.
Every difference requires a mental accommodation that gets in the way of immersion, so I truly appreciate it every time I can perform a task as I would in real life. Every single moment you spend on refining the functionality of this aircraft translates into real, tangible benefits to my proficiency. None of your effort is wasted.