As you may well be aware, the labor negotiations between the MLB and the MLBPA are not going particularly well. The players are asking for things like increased pay for players on their rookie deals (a class of player MLB has been increasingly taking advantage of in recent years) and a more flexible luxury tax threshold. MLB has countered with offers that would reduce rookie pay and luxury tax threshold flexibility, especially when accounting for inflation.
Perhaps even more concerning is something that MLB slipped into their latest proposal: a clause allowing them to shrink the minor leagues even further.