Batty, answers to all the issues you raised above have been given by BALPA and IALPA. Some are even given on a link on the public page of REPA at
www.repaweb.org . Minimal effort would provide you with all the answers needed and help you avoid speculating in directions that are just plain wrong.
Before posting something which is so misleading - just see the post which immediately follows yours for where it is could lead - why don't you check out the facts for yourself:
* You remain a member of your current association.
* If you are a member of BALPA, IALPA, etc. you get free membership of REPA.
* REPA is not a splitting up, but a coming together, an umbrella group. All Ryanair pilots, whatever their base, status (trainees, contractor), etc. get access to a common, secure, forum.
* As is made clear on the site, ECA is also funding the effort with IALPA and BALPA and the implication seems to be that it is ECA funding that is providing 6 months free membership to those who are not members of an association at present.
The story on the site seems to be that what REPA is to become will remain in the hands of those who join. You can speculate about that, but the correct place to do your speculation is on the REPA site (if you are a Ryanair pilot).
So is REPA really an ill-considered idea? I think it is a blindingly obvious first step to take. Congratulations to all concerned because we now have some hope.