He rebounded nicely last year, and earned that contract.
Disclaimer: I'm not looking to stir up an old argument, but as one who was involved in multiple discussions on this in the past, I feel it needs to be said.
Those of us who were hard on Greg in the past were not pushing a "clueless, obnoxious narrative". Believe it or not, since Greg entered the league, the NFL average on kicks beyond 50 yards is 62%, and the league average on kicks below 50 yards is 89%.
Viewed on their own, Greg's numbers look pretty good but compared to the rest of the NFL, less exceptional. The kicker of many nicknames had a rep that exceeded his performance. Noteworthy were his 2014-15 seasons, where his accuracy on kicks below 50 yards declined to 83 and 81%, both below the league average of 88% at the time.
As I say, he recovered nicely in 2016, more resembling his 2012-13 self.
Most people would take average at the kicker position, and so would I. Zuerlein was consistent and reliable last year, and we need more of the same.