I'll make a short attempt at a few:
1- Yes, this is what CMAS thinks, but I just disagree with their resolution (no constant). The researches I am aware of that helped CMAS shape that point of view discuss lung squeezes and long lasting damage from BO/LMC's.
I think most health risks in constant are due to the divers themselves. There are freedivers among us who consider a constant dive that was successful by the AIDA rules still successful if they spit blood afterwards. Same for broken eardrums (and not to troll this thread assume I mean avoidable ones). I also think some people might not consider their sambas and blackouts seriously enough.
CMAS's action was to stop constant and put JB on, what they got? (so I've heard) more blackouts and they weren't short on lungsqueezes as well - yes at 15m of depth. I think blackouts and apnea are too connected to be abolished by such a solution (if such a solution even exist!).
Regarding their referees risking their life, I think that's just plain arrogance from CMAS not acknowledging tech diving because it isn't a part of their organization. I think tech diving has a high enough safety record to claim we can support freedivers, I doubt people would have risked their life otherwise so some dude will get on top in some competition.
And beside that point, it seems to me that people who have been freediving for many years are healthier than most of ex-professional sportsmen, all those runners/football/hocky players with ruined joints and ex-athletics with legiment problems and lets not start with boxers and grand-prix drivers...
At the end of all, I am anyway willing to accept those minor risks left for my enjoyment.
2- I don't care about the olympics, and If only AIDA would deal with freediving (as it should from CMAS's act) and the IOC will want freediving inside the olympics being AIDA and not CMAS shouldn't disturb them much in my opinion (I find it hard to believe that agreement is binding forever under all circumstances).
3- So one should stop doing constant weight while waiting for the change to come within CMAS? admireable if you're willing to do this, I wouldn't have. Their draconic rule feels to me like a stab in the back of any person who appriciate freedome of choice. I would've let them kick me out for not going with their rules (so I'll be a part of their statistics).
Although I find their scuba array to be of better quality than PADI's I'm actualy ashamed I have a certificate of an organization that will do such a thing.