OT RE: DAK
IMO, that's because the majority of exploration trails lead to a bunch of trees and a few birds. Even the excellent paths in Asia and Africa don't get a lot of traffic. The park feels like one big walking marathon from one attraction to another, and Guests don't want to go on yet ANOTHER walking trail by the time they've finally hoofed it to the far regions of the park. I wonder if the two animal exhibit walking paths would be more popular if they weren't in the two back corners of an immense theme park.
I once discussed DAK with an Imagineer who used it as an example of poor Guest flow planning. He pointed to the bottlenecks in Africa and around EE, the confusing exit from KS, the dead-end cul-de-sac of Camp Minnie-Mickey, and a few more areas. He acknowledged that although DAK is a triumph of Imagineering's ability to create believable environments, it also suffers from a poor layout and attraction roster. WDI thought Guests would enjoy feeling like explorers, but they didn't consider that stroller brigades and hot summertime Guests wouldn't appreciate the meandering, frustrating pathways.
Anyway, I hope the FL expansion team learned from DAK! I'd hate to see the beautiful walkways covered with parked strollers.