Naughty Dog released TLOU in June 2013, developed an expansion with Left Behind in february 2014, canceled the Uncharted 4 version of Amy Hening in 2014, she leaves with the codirector and Bruce Straley and Neil Druckmann took over... a lot of crunch, a lot of pressure releasing Uncharted 4 in May 2016 with around 2 years of development. Bruce Straley leaves Naughty Dog, first sabbath then leaves officially.
Expansion is in development with Lost Legacy, releasing in August of 2017.
When we look at the problematic break up of the two project rhythm in 2014 and we still got a 3 year turn per game that looks still impressive.
Games just need more time and Naughty Dog is not the only developer, from Rocksteady to 343i, CD Projekt Red to Sucker Punch. As long as the games will be good in the end I do not care that it takes longer, especially with Open Worlds binding us longer (not Naughty Dog related for now).