Well, there are a good bit of pros and cons; I realize that a 7-9 team could upset a 12-4 two seed, but so what? If the 7-9 beats a 12-4 team, shame on the 12-4 team for choking to a team with a losing record in the playoffs. Honestly, if they are going to expand, knock off this BS with a bye for one team. Add an 8th team and have a 3 week tourney with everyone playing- you're almost there, anyway. It's already watered down, what's one more? This way, everyone plays all 3 weeks, even more money, and no break for a 1 seed who may darn well have gotten the one seed due to fluke tiebreakers.
Otherwise, leave it. 7 teams to me is just frigging annoying. Go 6, or go 8. But I realize this is probably an unpopular opinion, and I LOVE playoff time.