One of them was in charge of the Clutch settings....
Oh come on! So Rosberg had a racing incident with Vettel and lost ten points. That's a laughable comparison to what Hamilton lost through technical problems.Where Rosberg lost 10 points due to being shunted by Vettel instead of fighting with Hamilton.
It was the chief mechanic on each car, and four others from each side swapped, I'm not sure what the roles of the other 8 that switched sides were.