Actually Mercedes was super lucky today. What won them the race was the safety car driving the cars in the pits, thus removing the speed difference between cars on the racetrack (even if it was behind a safety car) and pits. Thus Vettel and everyone else who got new tyres at VSC period got pretty much robbed. And that accounts for good 10-15 seconds. Plus Hamilton would have got stuck behind the slower cars too, instead of Vettel getting stuck behind the Red Bulls and Kimi. In short, thus win was gifted to Hamilton by decision of race control to drive cars through pits in the safety car period.