The next step has to be 8 teams per league though, unless they go to 6 and the top two teams get a bye, but that could be both good and bad, especially if it messes up the rotation. It will dilute the entire post season, but it has to be significant money for the entire league and that will be tough to ignore.
The NBA and NHL are complete jokes with their playoffs and it's going to be a shame when the MLB follows suit.