I have never been to IOA yet, but I am going to guess that the parks do not "blow". The architecture, landscaping, etc, look great in the pictures. Very colorful and stuff.
Universal is not Disney. They will do things differently that what Disney tries to do with their parks. And that is a good thing! Where as Disney has parks that attempt to go really deep into the subject they are themed around (Epcot, AK), IOA is pretty much a "variety pack" park. Sorta like the Magic Kingdom, but still very different.
Besides, I bet a majority of the creative minds behind IOA learned their stuff at Disney Imagineering at some point in their life. A lot of them are probably former Imagineers, so I wouldn't put their ideas down just because they work at Universal!