Especially when the parts are outside. On a dark ride, when a figure is static, it might be noticeable but not as much (unless it is a key figure). Plus, they can do stuff to disguise it (yeah, let's put a strobe light on it). When everything is out in the open, everyone who walks past sees it. I still wonder how many of the general visitors actually notice these things. Fans, or fanatics, are much critical. I'm not saying that it is an excuse to just let things slide.