Rotators are an important part of a lot of cool looking vehicles, but they also eat up part count and performance. What if instead of using rotators, fuselages can just function as rotators in and of themselves, and you can modify the attach points and other parameters so that it can function however it needs to be.
Seems cool, but not really necessary. Rotators will use up maybe 10 parts, if use correctly. Also, this would be really complicated to use (in my opinion.)