For quite some time we have heard rumors that MLB wants to expand to 32 teams. It makes sense. Instead of uneven leagues, you would have 16 in each league, which would allow you to have four 4-team divisions. That also fixes some of the problems with the way the playoffs are set up now. Four division champs in each league. You could also if you liked, do some re-alignment. NL West would be LA-SF-SD-AZ.
One of the hang ups right now is the situation in Oakland. The A’s really need to move. Their stadium is a dump, their attendance is abysmal, and the team is not competitive, and hasn’t been in a few years.