I agree with the Manfred slander, but I don't think he has much of a choice in this case. Not only is expanded playoffs more financially beneficial for the league, but the regular season in the old format is too long with too many teams out of it for most of the season. MLB has already lost a lot of its national appeal, but they can maintain or even grow their regional base with more teams being in playoff races every year. Don't get me wrong, I prefer the 2019 format (2 WC teams, 3 division winners), but I realize decisions have to be made with younger audiences in mind. You can't sell a "marathon" and a "grind" to Gen Z's. Even the NBA is contemplating doing different things mid season (tournament) because their regular season, which is half as long as MLB's, is considered "too long". MLB's regular season is too long, their games are "too long", and the majority of the league won't be playing meaningful games in the last 2-3 months (old format). They had to make this change.
Now, I think they can tweak it a bit so that the higher seeds get more of an advantage (home field in every game seems very light), but the concept itself is probably necessary. I hate to say this because I hate Manfred, but I think all the changes he's done for this season are actually a positive. Seven inning DH's, a DH in the NL, 3 batter minimum, runner on 2nd in extras, etc. I know I'm in the minority here, but 7 inning games are more efficient to watch, 3 batter minimum means a team like the Rays can't spam 80 relievers in 3 innings, I'd rather watch Dom Smith become a star than a pitcher bat, and extra inning games ending in the 10th rather than potentially going to the 20th is refreshing as well.