a very nice angle here that shows exactly what mclaren gain from their different rear suspension, beside an undisturbed area around the brake-ducts and all the winglets surrounding it, they get a complete clean flow near the floor around the sidepods into the central diffuser, worth noticing also, mclaren with their diffuser has the lowest "cut" of all teams in the central spoon shape to allow air from the top to pass through
going through all the test pics so far, with flowvis and everything, they really seem extraordinary comitted to sealing the diffuser and extracting the most of it, add to that, that they are able to run the fw visibly closer to the ground during load, then other teams, i really am quiet optimistic about this car even it havent shown a lot of pace so far
And the sealing
the rear incl central part, disregard the numbers
lastly they moved the lower arms so close together they basicly work as one big flow conditioner, especially the front pickup point has been moved back to achive this but also for not to disturb the airflow further forward, i think
Compared to renault where the suspension arm pickup point is more forward
My main worry is if the agressive mclaren rear suspension is mechanically good enough, or to big a compromise has been made to accomodate aero