Also, I like the idea that the #1 team (if not the #2) gets a real bonus for that seeding. If it's "just" homefield advantage, you might see the top teams resting players and getting a sure thing instead of fighting it out for homefield and no rest at all.
And yeah, I usually skip half the playoff games already. So adding to that isn't likely to improve that ratio (unless my team is one of the two or four that gets added out of thirty-two - which is kinda likely if it was this year, but not usually). It wouldn't be as bad as the bowl games in college, but still weak.