It's so much more important to have a solid defense and a stronger offensive supporting cast than a great QB. I think that is the direction the NFL is heading. Once Brady/Brees retire the era of the elite god tier QB will be over.
There will always be really good QBs who win teams games tho. Because it usually makes that teams passing game awesome.
I have long thought that many front offices have overvalued quarterbacks with the value of their contracts, and with their draft behavior. There's no doubt that they often do (ironically, I bet NE is a front office that does not overvalue the QB) especially in the draft!!! But an organization is also run by dudes in a highly competitive environment, who don't often have the luxury of patience, and are ultimately judged and governed by an irrational mob (the fans). That dynamic won't change.
It's not like there haven't been teams before that have won a lot of games and championships that had lackluster quarterbacks. Nobody gave a **** about Tom Brady or Ben Roethlisberger when they won their first Super Bowls with awesome teams. I mean, Eli Manning (not that he's bad) has as many rings as his brother. Russell Wilson is considered an elite QB because he has won a super bowl (with a ****ing dynamite team). Teams are run by fans tho, and fans and the media (where the fans get their info from) tend to overrate the value of the quarterback in many aspects, because it makes the reasons for success and failure in the complicated team sport of football much more simplistic for the common, irrational fan to understand. So it is what it is.