I am surprised at Yale's decision. I do not know if others would count it as innovative, or original, but AA took the early work of Jackson and all who were recording the early western landscape and presenting that landscape to the American people and the world -- and he added a sensibility to the quality of light and how it speaks of a place. That sensibility carried through and informed the innovative landscape photographers that came after.[/QUO}
The exhibition was a joint enterprise between Yale through the Museum of Fine Art in Houston. The Royal College of Art in in London, and The Australian National Gallery in Canberra. It was the British (Mike Weaver) and Australian who felt AA shouldn't be included against the wishes of curators Norman Rosenthal.
From an International perspective AA was relatively unknown outside the US for a long time, the first I knew of him was a couple of years earlier so 1987, but I knew of Edward Weston mid 1960' s and Paul Caponigro in the early 1980's also Minor White.
Adams was not an influential photographer in terms of the art, he based his legacy on the craft. Personally I find old college colleague Thomas Joshua Cooper more inspiring

That's not to denigrate AA's work it's excellent but it's not cutting edge
Ian.