Having attended the first organiser meeting (but not yet read the notes) I took away this:
All the disciplinary issues the FRA had to deal with last year involved non-members.
There is some evidence (not that the explicit evidence was flagged up) that membership of an organisation leads to a greater likelihood of following its rules. The publishing of the 'Rules for Runners' posters has also been brought in to target the 'I didn't know the rules' excuse (not that it is a valid excuse, we sign the rules every time we enter a race, but how many read it?)

Travelling around fell races across the country FRA committee members have been surprised at how many people aren't even aware of what 'FRA' means, let alone what it does or its existance.
The collection of FRA member status at races is primarily a data collection exercise, but is also a bit of nudge theory to maybe encourage people to join (which seems to have worked a bit over Dec and early Jan).

Regarding championships - ROs organise the races, but the FRA organises and runs the championships. There are some championship stalwarts (unnamed!) who race in and win English/British championships, get on the guaranteed entry list, avail themselves of free FRA doo tickets provided to gold medal winners etc., but aren't actually FRA members. The free tickets and guaranteed entry list now, I believe, require FRA membership.

The FRA stated that they may allow a levy (e.g. £2) to be applied to FRA races for non-members, but that they don't want to broad brush the entire calendar. They stated that this would be at organisers' discretion and, as with most small EA races, the destination of the levy would be decided by the organiser and not sent to the FRA (we were told that for the EA levy, EA only keep it for the bigger commercial city marathons and the like)

There is some thought towards that for particularly arduous races - e.g. the ALs - FRA membership could be an entry requirement as they want people to think about their capability before entering a race willy-nilly online.
(Sort of like - Fell Running welcomes everyone but not all events are made for everyone right at this moment! It could be some way to head off people thinking 'I've done a Trunce therefore I can now enter Wasdale as they're both fell races so must be similar' or the like. I'm not sure how prevalent this mindset is but it is something I worry about!)

The Durham meeting was worthwhile attending and the organisers there were generally on the same page as the FRA for the points discussed.