The Olympic Class automatically gets a slot, though they seldom take it.
There is not a permanent Youth slot, but for the last several years, the Committee has voted to give the current Youth Champion one of the three petition slots - I fully expect that to happen again this year.
Personally, I agree that As and F-18s should both get a slot. Strong competition. The current set up was written before these classes had such consistent participation. I like change, and it seems warranted in this case. I still would like to hear what others think, since it is a decision that requires votes by representatives - decisions on the Committee are supposed to be constituency-based.