By the end of the season JET Mclaren had a decent rake & flexing wing too. Ferrari's wing were flexing all over the place. Mclaren had a long wheel-base & U-pods designed for EBD. I think both Mclaren & Red Bull optimised the EBD. RBR maybe a little more but Mclaren gained MORE because Mercedes engine's hot blowing was far superior to Renault's cold blowing.
Anyways MSC said the rear's feel great. Tyres that is. Weird. I though he liked a more grippier front tyre & not more grip on the rear tyres.