It would be useful if people (even if they didn't take notes) popped up with some of the "I didn't realise that..." moments that they had during the session

For example (off the top of my head) one of the clarifications that got mentioned was :
1. No, you can't just push someone CW around the track as long as they don't fall/go OOB/lose relative position - although Direction of Gameplay penalties have been brought inline with most other contact penalty's impact spectrum - there is penalty
5.9.21 -
Actively maintaining a stopped position (e.g., via braking or receiving an assist), or maintaining clockwise momentum, while impeding an opponent. that stops you from continuing to impede an opponent while stopped/CW