i don'no... to me it looked like the Horses just hooked up better than the Arrows with the way the clutches are now i think if fuel doping was an issue wouldn't wheel spin come into play?
from the video, the way Hammy was blocked by Nico it looked like it allowed not only Ferrari but RedBull to pass also
starts seemed to be problematic for Mercedes last year and maybe hasn't changed much?
but you are much more up on it than i am