I've noticed that either on a standing or rolling start the AI just bunches up immediately on the racing line instead of spreading out and covering all of the road like IRL, this just makes it so you can divebomb the inside and gain 5+ positions at once in the first corner. It would be nice if the AI tried to overtake each other and try to use all of the road to defend and gain positions instead of instantly sticking to the racing line, it just makes it very easy to jump them.