It seems strange that on single player I can choose the preset rules and tracks for a certain car/class, but when making a custom championship I don't get the option. I like the pre made custom championships but there is no way to edit the weather. Random weather maybe good for variety, but each session seems to have its own weather without anything carrying on to the next session. It is either a dry session or a wet one, I like when using real weather I sometimes get a damp track, or it starts raining part way into a race. Custom championship could be a great feature, especially if it ever can be used online with friends.
And for some strange reason in custom championship there are no penalties for crossing white line when exiting the pits but it works in single race mode. Is an odd one.