what next tdracer is just arguing, which is perfectly fine. No need to assume he's thinking CFM engineers are stupid.
The engine does make one difference compared to Boeings concept a/c x66(?). And it's a bet on future. If the engine fails to meet the requirements, Airbus busts.
Next is on the wings with in-flight flex by folding wingtips. avoids the truss braced wing otherwise needed on those high aspect ratio wings. Airbus had been working on shape-flexible wings, but came as far as trailing edge independent control of ailerons (or flaps, dont remember) for the A380.
Another risky innovation in terms of maturity.