I know around here we prefer to throw the Imagineers, as a whole, under the bus when we don't like something, but many times I don't think it's the actual Imagineers themselves that weren't creative enough to come up with new and exciting content, but rather it's the bean-counting, fiscally-minded management types that tamp down that creativity in favor of more "cost-effective" products that wind up being awful.
Anecdotally, I've been told that the key word at WDI is, "can't". As in, "we can't do this, we can't do that. It costs too much" etc.
Bottom line, I believe there is still creativity left within the halls of WDI, but unfortunately it's just not allowed to go beyond the "box" that management puts it in.