I think he said that they had tried to get something done about it before the race and hadn't been listened to. Perhaps he felt that the only way he would get anywhere would be by bringing it up with so many people watching.
I thought that too, might feel he has nothing to lose by making it more public if he feels there is definitely an issue.
...be correctly sized for the athelete like an everyday prosthetic (not just conform to some set sizes but be correct for the man) thus negating and artificial advantage a competitor can have over another.
I think this was part of what Oscar was alluding too when he said atheletes were turning and being way taller than they were previously.
Hopefully it'll get sorted one way or another and won't shift the focus too much from the actual events.