despite their names being written on the board in either HUGE red letters, or printed on the sheet.
I understand what you are trying to say but you need to acknowledge the fact that the people who do not respond to their names on the board in HUGE RED LETTERS will still not phone in just because the company ask them to. The new system will be far easier to abuse because:
1. The name will not appear anywhere anymore - much less visible.
2. There is no way the company can monitor engaged tones so will never be able to dispute a 'I called but could not get through'.
3. There will also be no need to go to the crew room anymore after a duty reducing even further the chances of contact.
You are right about it being a two way street though which is exactly why there are so many disgruntled crew at the moment.