Behind all the political white noise in F1, Toto Wolff actually revealed last week the root cause of Mercedes lack of performance this year.
He said it could be traced back to a decision last October when the team believed they could run the new regulation ground effect cars 'on the deck'
You can see how this has happened within a team who had just learned how to do this with last years car and gain a drag reduction which caused a certain Red Bull boss to accuse them of cheating!
I suspect with the thought of the new stiffer sidewall 18" tyres giving more control over ride height, they would centre their limited wind tunnel time around that premise. They probably also failed to recognise the full impact of new simplistic damper regulations.
Then, along came that Porpoise when the car got to the track and forced them to raise the car up outside the design window.
Ferrari also had a big porpoise problem, but as Martin Brundle observed last week trackside at Austin, their car also has remarkably good damping, allowing it to settle instantly after the initial bump. My own experience suggests that heavy control of the rebound damping can cause premature tyre deg. A trait Ferrari have certainly been suffering this year.
Adrian Newey has design experience which stretches back into the previous ground effect era and perhaps explains why Red Bull managed to come up right at the start with a really good compromise of aero, tyres and damping.
Despite all the development over the season, the basic design premise on each of the cars has remained 'baked in'