Grant expansion franchises to Mexico City, Charlotte/Raleigh, Portland, San Antonio/Austin, Orlando/Jacksonville, Sacramento, Las Vegas, Columbus, Nashville/Memphis and Norfolk/Richmond.
Realign into 8 divisions of 5 teams each. No more American League or National League, just one Major League, without any conference setup, just 8 different geographical divisions.
Atlantic Division: Baltimore, Brooklyn, New York, Philadelphia and Washington.
Northeast Division: Boston, Cleveland, Detroit, Pittsburgh and Toronto.
Southeast Division: Atlanta, Carolina, Miami, Orlando and Tampa Bay.
Metro Division: Cincinnati, Columbus, Indianapolis, Tennessee and Virginia.
Central Division: Chicago, Kansas City, Milwaukee, Minnesota and Saint Louis.
Southwest Division: Arizona, Houston, Mexico City, San Antonio and Texas.
Northwest Division: Colorado, Las Vegas, Portland, Sacramento and Seattle.
Pacific Division: Anaheim, Los Angeles, San Diego, San Francisco and San Jose.
Regular season reduced to 158 games. Each team plays three 4-game series' vs. their 4 division opponents = 48 games + one 4-game home series + one 4-game road series vs. 1 other team ( alternated per season ) = 8 games + one 3-game series vs. all the other 34 teams = 102 games. The 20 coldest weather teams play on the road at the 20 warmest weather teams during the 1st month.
Playoffs expanded to 16 teams, including 8 division winners, seeded 1 thru 8, + 8 wild cards, with a tie-breaker system used to determine seeds and even eliminate teams. All 4 rounds are expanded to best 5 out of 9, with a 3-4-2 format, except for the World Series, to be played at a warm-weather neutral site in November.
Rosters expanded to 30 players for entire regular season + post-season. All teams are allowed 3 designated hitters per game, and they are not limited to any positions, including pitcher. For example, if a team has a really good hitting starting pitcher, then their manager can DH for the catcher, shortstop and second baseman, or any 3 positions for that matter.
Each organization is limited to 1 Triple-A, 1 Double-A, 1 Class A, and 2 Rookie League affiliates. No more Class A-Advanced or Class A-Short Season, just 1 Class A level. The 1st-year Rule 4 amateur draft is expanded to include international players.