Solved

League change

When is the best time to change the lige? In my league the season is over and I got the title. Now I want to change the league. Is it better to join the new league with the start of the season? Will the car be weak in the next season as I join in the middle of the season?

In my opinion, I'd join a new league who is in the start of a new season, or at least no more than 5-6 races completed.

Since the next season car design has been applied to your car, the next season car design will now be zero and you do not want to join a league about to end the season as it will result in being uncompetitive twice.