i dont think they are messing around. is like in the 80's when the actually built an indycar.
They are to important to F1 for FIa to not take note and with majority of the teams on their side their will be a comprimise.
For once I agree with them as well two tier structure would be awful If the sources are right they can run flexible rear wings if within budget cap which is 1-2 sec's a lap.
F1 really knows how to shoot itself in the foot - potentially one of the most exciting seasons and they are rowing off track again