I think the issue with Navi is how constrained it was by budget. As far as I've heard rumor-wise, it was almost cut because the entire land went so overbudget and you can really feel it in this attraction. I'm actually fine with Navi as a calm boat ride, even if it is short, but doesn't warrant more than a 20 minute wait. Considering how new Pandora is, I understand it's going to be quite a while before that ever happens, but if it became the Living With the Land of Animal Kingdom, I think I could appreciate it better.