CaptainSandL,
You raise some good points here. one of 'm is:
5. The green MANUAL light on the pressurisation panel is not normally illuminated. Whilst this would not trigger master caution, it shows a lack of observation on the part of the crew, more specifically the F/O whose area of responsibility this is.
I guess it is about time that Boeing retrofits the GREEN Manual light and changes it to Amber, and make it one of the lights that reacts to the Master Caution system.
Easier said than done of course.