First, I know how drivers/teams etc look isn't important, it's about on track results (and overall sportsmanship). But DAMN did Hamilton look good on his first day at Maranello. I want him showing up to every race dressed like Enzo. Even if he crashes out of 24 consecutive Q1s, he's elevated the sport. Yes, I'm being shallow right now, and I don't even care.
https://www.planetf1.com/news/state-of-emergency-lewis-hamilton-ferrari-maranelloSecond, it seems that Hamilton has reunited with Angela Cullen. I believe that she has been as key to his success as anyone in F1. She very much helped make sure he was physically ready for each and every race weekend. Being physically ready is a foundation for being mentally ready, which I'm sure she helped with too.
We see a ton of videos of F1 drivers training (especially neck stretches and hand eye coordination games), but Cullen really took a whole body approach to ensuring that Hamilton was in tip top shape for a sport that taxes the entire body. I'm sure most, if not all, drivers follow the ideas and techniques she's set out, but in terms of non driver contributors to F1, she's up there with Adrian Newey and Colin Chapman as far as I'm concerned.
https://www.skysports.com/f1/news/12433/13293699/lewis-hamilton-angela-cullen-returning-to-seven-time-f1-world-champions-team-ahead-of-ferrari-debut