I'm not quite sure how Valtteri will go next year ?
There's so many variables that it's hard to predict.
The regulation changes might help even things out, but as has been mentioned Lewis' time, results, and presence within the team should still give him a slight upper hand.
One thing I can't discount, is Bottas is moving to a car that without doubt will be a massive upgrade from the Williams.
This to me is the most important thing because confidence is an incredible motivator.
Just look at Max this season.
He might be the next coming according to some, but the step up to a much more well oiled team and machine allowed him to shine with his new car quite quickly.
Same with Daniel Ricciardo's move to Red Bull.
Say whatever you want about Seb' having an off year, but Dan smashed him !
I believe it's much, much easier for a guy who's been in a midfield team to get to grips with a car that is way above anything he's driven to date.
If Bottas had stayed with Williams, (as much as I love them, they're my favourite team), I reckon he would have stagnated in a year or two, but first few laps in the Merc' are going put a massive smile on his face.
If he has the natural talent some think he does, there might be a few upsets this coming season because he's going to be on such a high that only driving the best car you've had to date can give you