My thoughts are based on the fact that once he had been penalised and virtually put out of the title challenge he has had no engine failures and has driven if anything harder so why couldnt they have done whatever they did a couple of months or 3 or 4 races earlier.
Hopefully Rosbereg will not finish. due to engine failure. and Hamilton win.but being a cynic I think Mercedes sorted that out earlier in the season to ensure Rosberg won.