I think Lewis has too much to make on up on the Red Bulls, 88 points behind and with only 3 podiums to date (i think), I think he'll be lucky to even beat his team mate George Russell, who didn't score at Silverstone as he was involved in that crash. As for the speed issues, they had tecnical problems all year from what i've read, and whilst they are getting solved slowly other teams are improving also, so they are mostly playing catch-up.

A shame for Murray, as he worked so hard to even make it into the draw, but I feel he is past his best, and the injuries and surgeries are just starting to catch up with him. Oddly though the guy who beat him is actually 2 years older at 37, so age isn't much of a pointer (Nadal and Djokovic are still at the top at 36 and 35 respectively).