There's not much of a difference, at least for me. 3 divisions and 4 wild cards. If they whittled the four wild cards in single elimination games down to 1 team, it wouldn't be too far of a departure, and I'd have the same level of interest as now (only if the Sox are in).
However, they will likely have the top record with a bye, and the other two division winners are thrown in the slop with the four wild card teams in a best of three or five, I like that the best team is rewarded in that scenario, but division winners shouldn't get mere home field (either 1 game or all) against a 75 win wild card.
There is still no legitimate competitive reason to expand the playoffs beyond the current set up, whether they go four divisions (there should be no wild cards) or keep the three. My preference would be keep the current six five team divisions. Top record in each league gets a bye, the second best division winner hosts the third in a best of three, the winner playing a best of seven. Division champions competing for a championship.