What makes you think the system is going to fall over? I don't believe there have been any cases of the AFPEX system falling over to date?
I wonder how many movements there are inside that restricted zone on a normal flying day. By that I mean those that start and end the same flight inside the zone and how many of those are in aircraft that can't meet the requirements. Allowance seems to have been made for all types in the notice. It's just it will be a pain to follow but not impossible.
Like I said, I am happy to be shown what I am missing here that convinces you and others they will be grounded. Can you do me a favour and cut and paste the bits that concern you and explain why?