I disagree with your base assumption. There is only a documentation problem with such changes if you allow them.
Voltz is a mod pack put together with a certain idea in mind. To put simply, Voltz is build around 3 pillars: UE, Mekanism, and ICBM. If you change any of those, it's really not Voltz anymore.
I'm not saying Rotarycraft is bad in any way. It's a very interesting mod which could be quite fun to play. The problem is that it has nothing to do with Voltz. Voltz is Mekanism.