I just want to also add (and of course it's convenient for me to say since it obviously affects us adversely more than anyone), this format absolutely sucks. They've watered down the playoff field, though at least all NL playoff teams this year will be good ones.
But it sucks that we're going to get bunched in with the 3 wild card teams rather than the 2 division winners and have to play a short series where anything can happen just to even make the NLDS.
I thought the one WC, 4 team format was perfect. I could even stomach the 5 team format with the two WCs doing the play-in, though I liked the 4 team more.
Oh well, just a rant since they're obviously never going to go back. More teams = more games = more money.