There were some fascinating things on display. For instance, the first woodcut of Indians from Columbus's voyages in its original 1495 printing. Portraits and engravings so lifelike they looked photo-realistic. Photographs that belong in the Photograph Hall of Fame if they aren't there already.
Unfortunately, there were few depictions by those who hadn't met Indians and wanted only to exploit them--i.e., in posters, playbills, and dime-novel illustrations. And nothing from the 20th century except the Curtis and Moon photographs--no movie stills, product packaging, or sports memorabilia.
There could've been more effort to put the illustrations into context--to explain how the images changed over time, how Americans used them to further their own agenda. Curator Hight's statement tells you'd more than you'd probably learn from the exhibit itself.
Some additional thoughts:
This last point applies to the photographers too, of course. Curtis was notorious for his theme of the vanishing Indian: "chiefs in feathered headdresses, aging patriarchs, women struggling to manage, and the war parties of past eras." It wasn't until sometime in the 20th century that someone tried to capture Indians the way they were, without editing or "enhancing."