With the exception of 2017 and 18, the two successful Wild Card qualifiers have been separated by one game or fewer (since the addition of the WC playoff in 2012). That's pretty interesting. Several of them would have just been tie-breaker games pre-2012.
Like any curmudgeon, I am skeptical of any changes to the season, but I really think this system is excellent. It puts that much more value on a division title, hasn't watered down the competition in the playoffs, and still provides a nice mirage to mediocre teams to keep them from obviously chucking in the towel.