For now I like this format, though my opinion could change after the postseason im sure. As a AL east fan i think it has made the end of the regular season much more exciting. Win your division and don't worry about the play in game. I dont even want to call the wildcard game the postseason yet, i think play in game is more appropriate now that i think about it. But the play in game is worse a factor for a strong division, as a wild card team could potentially be the 2nd best team in the majors (record wise), and have to win one game to really get to the postseason, which might be the worst case for this format, but it makes that division race that more exciting and important. There are going to be a lot of different dynamics to come at the end of seasons if they keep the format. I don't think increasing the importance of winning the division is a bad thing.
also as an AL East fan i secretely wanted there to be a 3 team tie at the top with the yanks o's and rays. especially if there are more ties throughout the american league, like 3 way ties for the wildcard and division ties. ITS CRAZY.