Though it probably isn't good for the league as a whole I miss the days when there were truly dominant teams and franchises. That's probably a big reason now why I'm not as big of a pro football fan as I used to be and prefer the college game because we still get those dominant teams and dynasties and turning a losing program around is still a real accomplishment there. The NFL today is more of a GM's game than anything. Signing free agents has become more important than drafting and building players up.
But again I realize it isn't good for the NFL as a whole which is why they seek out so much parity. College football can get away with it because overall the fan bases are a lot more rabid in college than they are for pro football. 90,000 fans will still show up to watch their team go .500 in college.