I think the following are not in the
list thread. They are for setup with the current MLB structure, but they do not sound like what you want.
https://forums.ootpdevelopments.com/...d.php?t=357017
https://forums.ootpdevelopments.com/...d.php?t=358587
https://forums.ootpdevelopments.com/...d.php?t=360594
https://forums.ootpdevelopments.com/...d.php?t=362525
https://forums.ootpdevelopments.com/...d.php?t=362650
I think you want something like the current MLB breakdown of games, in particular playing all 15 interleague teams, with two series (instead of one) against one particular team. There are a few ways that could work out with somewhere between 12-14 games per division opponent and 6-7 per interdivision opponent. Is that what you want?
One trick in that is lining up those interleague rivals correctly which depends on the teams and setup. What is assumed in the schedule build may not end up matching any given league configuration, requiring back-and-forth to work out.
Keeping the rivals is another issue which I think you hint at with the note about variety. Reloading the same thing every season keeps the rivals aligned but keeps everything else always the same -- you always play everybody at the same times through the season. I have not completely thought this through, but I think there is a way to create variations by rotating teams in a synchronized way in the two subleagues.