I was stuck on High Heat 2002 for years thanks to baseball sim central and the rosters and uniform mods. I created a World League, had about 16 teams I think (two special teams: Cooperstown Legends which featured recently retired players that were hidden, and an all custom team that was a combination of my Senior/Big League teammates and HS teammates, and an all European team). I played that endlessly until about 2004.
OOTP to me has limitless potential now that we have international and club tournaments.
Maybe they can update Associations or allow us to have Winter League tournaments involving those club teams