It seems like things are just changing naturally regarding foreign players

Baseball: 3 foreign players + 1 Asian Quarter player allowed to play
Soccer: Unlimited foreign players, but only up to 5 can be on the pitch at once
Volleyball (starting next year):
Men: 2 foreign players + 1 Asian Quarter player
Women: 1 foreign player + 2 Asian Quarter players
Basketball: 2 foreign players (only allowed to play in 2nd–3rd quarters) + 1 Asian Quarter player
It actually seems like baseball is the most conservative.