I think merits its own thread, though it might be a while before there are tangible (rather than proposed) details to discuss
One plan that has been discussed, according to two people familiar with the negotiations who requested anonymity because they were not authorized to speak publicly about the matter, would convert some teams from the lower-level minor leagues — short-season, rookie ball and lower Class A — into a so-called Dream League of undrafted players looking to break into professional baseball. Teams in that league would be co-owned and operated by M.L.B. and Minor League Baseball — a departure from the current system, in which the vast majority of teams are independently owned and operated. Part of the proposal could include a plan to cut Baseball’s amateur draft in half, to 20 rounds, which would reduce the player pool by 600 and subsequently eliminate the need for roughly 20 teams.
At the root of the disagreement is a preliminary proposal MLB has offered to reduce its number of Player Development Contracts (the affiliation agreement by which MLB teams provide players and staff to MiLB teams) from 160 to 120. That reduction would completely eliminate the four, non-complex Rookie-level and short-season classifications from the minor leagues.
The proposal also completely reorganizes the full-season minor leagues. While there would still be Triple-A, Double-A, high Class A and low Class A, those four levels would be completely reworked to make the leagues much more geographically compact. In Triple-A, the Pacific Coast League would shift from 16 teams to 10. The International League would grow to 20 teams. The 14-team low Class A South Atlantic League would be turned into a six-team league with a new Mid-Atlantic league springing up.
The short-season Northwest League would move to full-season ball.
Under MLB’s proposal, some teams would be asked to move from Class A to Triple-A. Others would be asked to move from Triple-A to Class A, and there would be other less dramatic moves as well.