I'm gonna have to go ahead and say NE is one of the best teams ever (dynasty) whether they win #3 or not. To beat Indy the way they did minus Poole, Law & Seymour is nothing short of amazing. Pittsburgh, on the other hand, hasn't really prooved anything yet. Cower hasn't won anything. This is the time for them to step up.
(Making every attempt to be objective.) I agree the Patriots record is amazing in light of the "modern era" of free agency.
Chances are they will lose both their Offensive Coordinator (already gone) and their Defensive Coordinator this year. They will also lose Ty Law (though he has missed most of the year anyway).
If they have continued success they are a true dynasty.