1. I suspect that an actual medical reason on EY at CDG, even if it is a crew member, will be an extraordinary circumstance and mean no compensation.
2. More important, but EY is not likely to figure it out is that EC 261/2004 does not actually apply to this ticket. For the very reasons stated in the decisions which have led to the determination that the Regulation is determined at the final ticketed destination. This is a single ticket US-BOM which happens to have connections at CDG and AUH. As various courts have pointed out, those connections are mere mechanical and administrative matters, not relevant to the passenger's actual ticket. Thus, this ticket is on a non-EU carrier between two points outside the EU and the Regulation never applied in the first place. Now, that would not deter me from making the claim (recognizing that
#1 will likely kill it). Someone at EY would have to go back and analyze how OP got to CDG,