Quickly, as I think while I type.
4*8.
In division...12*7=84
In league...6*8=48
Other league...3*8=24
Leaves 2 3-game series interleague available for rivals.
Playoffs... Top 2 in each div qualify, plus 2 wild cards.
First round would be the 2nd place finishers vs the WCs.
I have a massive document, but the cliff notes are:
Four Divisions of Four in NL and AL - 4-4-4-4 is hard to divide properly. Playoff format a mess (4 division winners per league. No wildcards seems unfair. One-game Wild Card vs Division champ is unfair. Byes are crazy in baseball. 16-team playoffs with four full ROUNDS also crazy).
Two Divisions of Eight in NL and AL - Better playoffs (2nd vs 3rd in each division play a Wild Card game; doubles WC games from 2 to 4; then LDS, LCS, WS like now).
HOWEVER: Doubles the amount of times the CTZ teams play at PTZ/MTZ (whole reason MLB split into six divisions in the first place), which is bad for their TV deals.
Radical Geographic Realignment
NL West (All PTZ/MTZ teams), NL Central (all CTZ teams), AL North (NYC and up), AL South (ETZ from PIT/PHI and down). Better Playoffs. HOWEVER Totally destroys AL/NL history dating back to 1901; and still 50% increase in CTZ at PTZ games in unbalanced league schedule.
To combat that, the proposal was 156 games with 12 vs Division, 3 vs everyone else (12 teams home, 12 teams away). Which is really a “Four League” plan, but with only two league names because AL/NL is “important enough to not add two league names, but not important enough to preserve the separation that’s existed the entire history of the sport” (!???!?!)
Main argument was “to reduce travel.” But that’s a lie: Instead of ONE Away vs 10 non-division teams + 2 road interleague; it’s home OR away with 24 other teams (aka, still 12).
It actually INCREASES the number of CTZ/ETZ road series at MTZ/PTZ teams (despite reducing the schedule by 6 games!)
AND they’d play the same number of total series (54) as now, which means the same amount of flights for each team, just some are shorter flights that before.
The unspoken real reason is: “More tickets sales by playing rivals more!” Which ALSO really isn’t true.
Current: 76 games vs 4 division rivals, 4 to 10 interleague rivals (86 games).
Plan: 12 vs your division (84 games).
Interleague “rivals” are accidental: CLE gets bonus CIN/PIT non-division rivalry games; but they'd have to form rivalries with TOR, MON, NYM.
Or just get rid of the american and national leagues and go east west. Toronto should be in a divison with cleveland, detroit and chicago anyway.
If they did radically realign, Toronto would not be in the same division with the White Sox.