All that and i dont see perhaps the most important factor (in last 10 years anyhow.
the NFC has had MUCH more parity. The AFC has been primarily dominated by 2 teams... NE and Pitt. Pitt had a more difficult division than NE which explains the bye theory in the AFC. Which is, the #1 seed is much better than the others. In the NFC , its a more level playing field so the team that gets the bye isnt far better than the others.
For me, i'll take the bye. It not only guarantees a win in first round, but all other games are at home which is where the REAL advantage is..: all other things being equal.
pretty simple in my view.