I wondered why OTS and Classic were non-official years ago......took a poll at a GSCB Stunt Forum attended by about 50 people and the overwhelming opinion was to leave them as non official.
I wondered the same about Beginner and later Intermediate.......
Mayhaps I'm getting senile, but I think it's fine that those four classes are non official, one day, events......they are fun, and staffed by volunteers that are often flying later in the week.......
My puzzlement now is why we fly three age classes and two official classes.....I'm a believer that Expert should be flown and J,S,O eliminated...
Have fun....