If I had to bet I'd place money on Mercedes resuming command in China. The problem is that Ferrari were less than a tenth off pole in the wet and then won the race in the heat. Two very different sets of conditions. I haven't seen Mercedes allude to it but did they compromise their race setup in order to cover potential wet weather? That would explain why the Ferrari, possibly setup for the dry, was so competitive in the race. But wouldn't that have compromised their qualifying pace?

I think it's probably safest to say that a combination of Vettel really liking Sepang, the F15T being gentle on it's tyres and Mercedes getting their strategy wrong led to the Scuderia pinching a win. As happy as that makes me I'll take it as a bonus in what looked like it could have been another win-less season.