With all due respect, you should leave the judgement of whether or not Disney has competent engineers to actual engineers. I happen to be an engineer. Based on what I have seen and read, I'd say Disney has very few if any "great" engineers. Most seem to be middle of the road, BUT, they are the type of engineer that tends to have an artistic bent, which I assume is what Disney is looking for in an engineer. However, as we used to say in school, in engineering there are right answers and wrong answers. You don't get partial credit for designing and/or building something (anything) that fails, especially when the failure can cost lives. In my experience, people with an artistic bent tend to believe too much in partial credit...