Amazing post that goes back to a conversation I had years ago with Ira West, one of the most legendary park designer in the industry. Ira West was part of Randall Duell design firm and he helped design throughout his career Magic Mountain, Kings Island, the Marriott's Great America parks, Parc Asterix, Samsung's Everland (their 8 million guests a year theme park in South Korea), Hersheypark transformation to a gated park, etc.
I met him at an industry event where Joe Rohde was receiving an award for Aulani and where he did a keynote speech about designing it. After the speech, I asked Ira West his honest opinion of Joe Rodhe. His answer was similar to what you said: worried about details than substance. Animal Kingdom was an awful park design from a guest flow and operational point of view and its only in preparation for Avatar that they started correcting the infrastructure.
Research trips are not a bad thing per say, but it should not occupy most of your financial and time ressources. Six Flags Magic Mountain Roaring Rapids has primitive, but still nice rock work around the later portion of the ride. Research trip for what they should look like? Ira West just pulled his photos from his rafting trip on the Colorado river that he went on before and that was what they used to make the river look more natural.