As someone who visits 4-5 times per year (and we live out of state), I agree that it is only noticeable from a few areas within the park and its far from anything that will ruin the moment. That being said, when you do notice it, its just plain ugly and you cant help but think, "is that the best, or even half best that Disney could do"....and within a few seconds you move along and continue to enjoy your day.
I know Disney can (and should) do better than that. If that makes me a complainer for simply thinking it, or typing it in an online fan forum, so be it. I hope they prove me wrong. They could very well install paneling to improve the look or some form of exterior "plussing" before the attraction opens. But the "wait and see" approach hasnt exactly been friendly over the last few years.