Huh, editing the schedule in Franchise Mode for extra postseason games does sound like a workaround, but I'm a tad skeptical about how smoothly it'd work out. While there might be a Playoff Editor floating around, manually adding games and setting up the final eight teams sounds like a bit of a hassle.
If you're still on the hunt for a solution, here's my take. While I'm all for tinkering with game mechanics, when it comes to downtime, solitaire is my jam. It's a reliable way to unwind, especially since you can play it online whenever boredom strikes. So, while the idea of tweaking postseason schedules is intriguing, don't forget to weigh the effort against the payoff.