To address the comments on WDI..... There is always going to be the case of young, inexperienced designers getting their feet wet on projects. One has the ambition to create and feel like you are going to be the one to make a profound difference in the projects you work on. But the reality is that starting out you just don't have all the tools and experience to bring projects to a level of sophistication they need to be.
I feel that Mentors are the key to the success of a design studio. Good mentors will be able to recognize the talents of their new designers and help them to be their best -- and most important, make them feel included in the creative process. Too many times I have seen people move on because they feel under-appreciated. When it become a battle of wills, the project deteriorates. A successful effort is collaborative as it brings out the best talents of everyone.
But it works both ways as well -- being a young arrogant designer is not going to get you anywhere because the keys to success is expanding your abilities and experience. Many of the people I have seen move on do so because they allowed their egos to get in the way. Even if you are working for someone you don't like, they may have the knowledge you need to improve yourself. Thus as a young designer it's important to have an open mind so that you can uncover the important things that will make you a success later on.
Not sure if this exactly applies to WDI, (my experience is in architecture), though design realities seem to be pretty similar everywhere. It may help those who encounter Imagineering to understand the dynamics better, and offer some advise to those pursuing a design career.