All the gameplay rule changes(shift restrictions, pitch clock, etc) agreed in the CBA negotiations are set to happen next year so there's time to thoughtfully implement them. The exception is the universal DH, which does start this year. And I think MLB has complete discretion to implement or not them next year, they just have to give a 45 days notice. Yes, they have an 11-person committee to discuss rule changes, but 6 are MLB reps while 4 player reps and an umpire are there. So while there will presumably be discussion and input taken from the other 5, MLB can push through what it wants.