People need to just spend a few hours reading the rules and thinking critically so they don't repeat the same questions and comments for the next 30 years.
Having studied the tie-breaker rules pretty thoroughly, I came to the conclusion that they're very fair.
The number one tie-breaker (and rightfully so) is the head-to-head. What better way to prove you're better than a team than beating them? However, as has been said many times, this only applies if the tie is between two teams or if it's between three or more teams who have all played one another. Why? Well, consider this:
A beats B, B beats C, C beats A
Who are the top two teams? Hard to tell. They're all 1-1 against one another. Believe it or not, this happens quite a lot. Let's look at this year. Dallas beat Seattle but Seattle beat Green Bay. It's hard to compare Green Bay to Dallas since they never got a chance to play us. However, if Dallas also beat Green Bay, then according to the tie-breaker rules, Green Bay having lost to both Dallas and Seattle would be eliminated. Then the tie-breaker would come down to Dallas and Seattle (which Dallas won the head-to-head). But, since Green Bay and Dallas never played each other, head-to-head is not considered but conference record is. (Please just take 10 minutes and think about it. I did and I came to the conclusion that it's fair.)
Now, if you have three teams tied but two are in the same division, the team in the same division with the tie-breaker advantage eliminates the other team. This, in my opinion, is also fair. That's why, if Arizona would have won today, they would not have been compared to Seattle, Dallas and Green Bay since they would have been eliminated via being in the same division as Seattle. This method gives preference and meaning to divisions, which I agree with.
Lastly, I also agree with the order of the other procedures. First is division record, which, like I just mentioned, is an important thing in the NFL. Next is conference (which is where Dallas hurt themselves this season). Next is common games, then strength of victory, then strength of schedule, and I believe coin flip if all else fails. It makes sense. You have to win what's closest to home in the NFL. Division over conference, conference over non-conference. That's just the way it is. And I like it.