Not surprising given the present climate and recent incidents.
Runners have 2 choices.
1. Enter an Fra sanctioned race and comply with the new rules.
2. Don't run Fra races and enter BOFRA or other non Fra races.
Race Organisers have choices also.
1. Agree to implement the new rules and have your event Fra sanctioned.
2. Decide you don't like the new rules and don't want to implement them. Have your race under your own rules and don't get Fra approval

I suspect most RO organise their races these days under Fra rules primarily for the insurance, UKA affiliated clubs though have exactly the same insurance. There is no real need these days to advertise a race in the Fra calendar, there are lots of other places online and otherwise to advertise.
For most RO though most of the new rules should help especially with a tightening up of the rules regarding numbers which has caused lots discussion on this forum.
As for Waterproof as opposed to Windproof we all know as runners that there is no such thing as Waterproof, half an hour or less of running in the most expensive Waterproof kit and you
are wet through ( inside ) Breathable, rubbish, might be ok for walking or less energetic activities but for fell running forget it. If you have a mishap and are stationary or moving slowly a Waterproof jacket rather than a Windproof one might offer a minimum amount of extra protection. Gonna have to get bigger bum bags though as the bulk will be increased considerably.