Even when I'm in the playoffs, I think there are too many placeholder days and too many days off.
IRL, it strains a pitching staff to run a 3 man rotation, and a strong starting performance in Games 1, 4, and 7 is one for the ages. In HBD, too many pitchers can go on the "short" rest with little repercussions. I think it is one of many subtle things intentionally built into the game to improve the inferior team's odds of winning.