While the #2 no longer gets a bye there are still a couple of advantages to it over the 3 or 4.
A) not having to travel until the AFC Championship. While home field might not mean much this season not having to travel across country is still a huge advantage in the playoffs
B) Avoiding KC until the AFC Championship
C) Maybe buffalo prefer to play whoever gets in as the 7 over the 5 or the 6
True, though couple factors I'd point out...
1. I'm not sure that Buffalo being at home in the playoffs is ideal, given how they operate. Historically pretty terrible weather in January in Buffalo, and while I don't think they'll necessarily struggle with it, Buffalo isn't built like a normal Bills team. I'm not convinced they're going to be nearly as effective on offense in bad weather, and they're susceptible to being run on also. Like if I'm Buffalo, I probably don't want to play the Ravens or the Browns in the snow in Buffalo.
2. Its unlikely they'll know any seeding in the wildcard rounds until after their final game is played, so they likely don't have the luxury of "picking their opponent". Playoff seeding in the AFC in general, outside of maybe some clinched spots, is unlikely to be resolved before week 17. That final weekend is going to solve all of that.
3. I'm double checking my scenarios, but with a 7 team playoff, I'm pretty sure its impossible for either the #2 or the #3 seeds to play the #1 seed prior to the AFC title game. Obviously at #2 its impossible, but as the # 3 seed, they'd be matched up with #6 in the wildcard round. If they win that, then by definition, either the #4 or #5 seed would have to win, meaning a lower seeded team will have to win a game. That team would advance to play KC, unless #7 wins.
So basically, the only divisional round opponents possible for the #3 seed to play would be #4, #5, or #2. They couldn't play #7 or #1 in the divisional round.
As far as I can tell, if both Buffalo and KC win in week 16, KC will lockup the #1 seed, and Buffalo will be locked into either #2 or #3, regardless of what happens in week 17. At that point, if I'm them, I'm not playing starters very long. And if they get the #2, it would be very possible that their week 17 opponent, which is Miami, is the team they'd see in the the wildcard round anyway. So that's even less incentive to "show your hand".