It motivated doing it - but without willing cities and large expansion fees it'd have not happened.
32 teams, 4 divisions - 12 games in the division, 9 out of the division, 6 interleague games. It's a more balanced schedule - 135 of the teams 162 games are identical in each league.
Division winners make it, 4 wild cards otherwise. Two wild card games. Elimination games are awesome, and we should have more of them.