Please now it should be obvious to all that Mercedes is going relatively back in pecking order, and it gets worse every year.
My analysis is that it´s not tyre degradation. The car is absolutly crap on mid-to-full fuel load.
When the tank starts emptying they getting more competetive but hen it´s too late. Qualy is empty tank and the w-duct makes it fast, but it does not really matter becuse in the race they only get about 10 laps in the end where they are competitive. Both Nico and MS started to catch today in the end and the same for Australia where Nico started catch in the end.
Wondering what can cause this and one thing it could be fueltank layout, suspension layout/functionality. I don´t think it´s aerodynamics because the car is clearly fast on low fuel, and it wouldn´t be if aero was screwed.
I predict that very soon there will be an announcement that there is a "fundamental" issue (this year again) which causes problems with high fuel loads.