Expanding the playoffs is no way to solve MLB’s problems. Fixing a competitive imbalance league-wide is.
Baseball is best served shortening its regular season to 150 games, starting sooner, ending earlier and getting out of the NFL’s way.
If anything needs expanding it’s the opening divisional round. Either make it a seven-game series, or grant home field advantage to the higher seed throughout the entire first round.
Presently, there’s little advantage to gunning for the division title if a team is already in position to make the playoffs. Playing all five games at home would change that.
Adding two more wild cards only cheapens the regular season. The problem isn’t too few teams in postseason play, but that they’re not enough teams that can actually compete for October.
Creating a salary cap of some sort has a better chance of improving the game in all markets, where as adding more Wild Cards improves the chance of more big markets playing in the postseason.
That’s good for television, of course, but bad for fans–a formula baseball’s had down for a long time.