It is. They move at one speed, and Imagineering is the problem. Maybe the new guy they just appointed can fix it, but it seems to be a corporate culture problem.
Unfortunately, this is part of Walt's legacy from what I understand. Imagineering (and WED/MAPO before it) was designed to stand alone and basically charges the parks for their work and is very protective of their role. Nothing happens without their permission and approval, and as a result things take a long time to happen as things filter through the layers of bureaucracy.