I think there's been a basic misunderstanding of the difference between an API and a Mod.
A Mod is something you use and play with as an end-user. An API is a framework for mods to work with, to make the modder's job easier.
RF is an API, not a mod. By itself, it does absolutely nothing but provide a clean and efficient code framework to run, in this case, a power network. However, it doesn't dictate how that power handles from an end-user perspective.
The RF API can be used to make as complex a system as possible. If you want wiring to blow up when receiving power in excess of the limit, you can do that with the RF API. If you want a power network that can only go so far without needing a relay? You can do that with the RF API. If you want a power network that you have to be particular as to how you set it up to avoid inefficiency? You can do that with the RF API.
People seem to be confused because the Thermal Expansion power network, based on the RF API and its showcase, was a simple and elegant system. That doesn't, however, mean the RF API is limited to that sort of power network.
Looking at the votes, I find that there are currently more people voting for complex systems than simple ones. Maybe someone will recognize this and make a power mod based on RF that isn't simply plug-and-play.