The concept of a major/minor league for gyms is something that's been there from the very beginning.
Are you happy with how SWSH went into more detail on it? Forget about the games themselves being a shitty Alola rehash or how the latter two gyms didn't even get any unique trial for them like the others did.
If they were going to bring the concept back in SV, how would you implement it? Do you think there could be a more dynamic system where choices made in the story affect what type the later gyms are?