vladamir the Renault power unit didn't improve one horsepower last year because they were using 2016 parts on a 2017 engine because the 2017 parts kept failing. Recently we have heard that Renault are supposedly over there issues and yet today we have on grandprix247.com cyril complaining about the 3 engine rule which makes me think that maybe they aren't over there reliability issues.
Red Bull won GP's purely on luck and the improving red bull rb13 chassis. No one else below the top 3 would have been able to pass Hamilton running in conservative mode in Malaysia. Certainly no other Renault powered team could have.