I would want expansion to 32 and with it my new alignment to occur in 2029 when new TV deals start. Here's the broadcast rights I would like to see:
Sunday morning (11 AM ET or CT time depending on where the game is played): Peacock (PCL teams not eligible for this package)
Sunday afternoon: ABC (starting third week of May), a national game
Sunday primetime: ESPN
Sunday late night (10 PM ET): Peacock (PCL teams only), package is named "MLB Last Call" and would be created to make up for the proposed exclusion of PCL teams from Sunday Leadoff.
Monday night: Apple TV+
Tuesday night: TBS*
Wednesday night: Peacock*
Thursday night: MLB Network
Friday night: Paramount Network (produced by CBS Sports)*
Saturday afternoon: Fox Sports 1*
Saturday night: Fox, 4 regional games (most weeks with three games at 7 PM ET/6 CT, with a game between 2 Midwest teams, a game between 2 Northeast teams, and a game between 2 Southern teams, all three eastern leagues must be equally represented including during the first three weeks of interleague play which now spans from the third Monday in May to the Sunday between June 25-July 1, with a PCL game at 7 PM PT/8 MT; in weeks where PCL teams play interleague games, all games start at 7 PM ET)
* - indicates doubleheader (except for FS1 in September, single games that month due to college football coverage)
Regular season games on MLB Network, Paramount Network, TBS and Fox Sports 1 are non-exclusive and blacked out in the territories of the participating teams. Games on other pay-TV platforms are exclusive.
The Field of Dreams Game (if it returns to MLB's schedule from 2024 onward) will still be permitted to air on broadcast TV on a Friday night in August opposite Paramount Network's coverage, but it will now alternate between Fox and ABC. As it would now take place when no interleague games are being played at the time, each of the three eastern leagues will alternate participating in the game. A Midwestern team must be the home team, whether it be against another Midwestern team or a team from another region. This means the Twins will always be the home team when the CL has its turn in the Field of Dreams Game.
The playoff TV rotation for the first two rounds would be this
2029/33/37: AL on FS1, NL on TBS, CL on ESPN, PCL on PN
2030/34/38: AL on TBS, NL on FS1, CL on PN, PCL on ESPN
2031/35/39: AL on ESPN, NL on PN, CL on FS1, PCL on TBS
2032/36/40: AL on PN, NL on ESPN, CL on TBS, PCL on FS1
MLB Network airs two exclusive LDS games (both game 1s) - NL and PCL in odd years, AL and CL In even years
All first round (now best-of-3 LDS, first game at lower seed) games would be played at 1 or 7 PM local time, time in ET depends on where the game is played.
Second round (now best-of-5 LCS) games are played at 1, 4, 7 and/or 10 PM ET, PCL can't play at 1 PM, and only PCL can play at 10 PM
The best-of-seven National Semifinal Series, which seeds the pennant winners 1-4 based on regular season record, would air on FS1 and PN in Odd years and ESPN and TBS in even years. Each network can move a game 7 to a sister broadcast network: FS1 to Fox, PN to CBS, ESPN to ABC, and TBS to The CW.
Early round playoff games on weekdays to which FS1 has the rights can be moved to Fox if played in the afternoon, night games remain on FS1 to protect Fox's primetime lineup. ABC on the other hand will usually not air any pre-WS playoff games, as ABC usually has daytime programming 7 days a week. Fox itself would not air any Saturday afternoon playoff games before 4 PM ET, to protect Big Noon Saturday.
ABC would air the World Series in odd years and Fox in even years. The inverse would be true for the All-Star Game.
ESPN can also move broadcasts of early round playoff games to FX or FXX based on its other sports commitments, like college football on Saturdays.
Select games on ESPN, Paramount Network, and TBS can have alternate telecasts produced for kid-oriented sister networks aimed at this audience (Disney Channel, Nickelodeon, and Cartoon Network respectively, with Nick broadcasts featuring Jessica DiCicco in character as Lynn Loud Jr. from the Michigan set series The Loud House whenever the Tigers are involved). Nick would also air a weekly highlights series, MLB Slimetime, which is similar to NFL Slimetime. Special editions of MLB Slimetime would air after each pre-World Series playoff round.