And this drama is exactly why Elo hides.
Saw a lot of this same kind of pointless back and forth in the Technic forums, before I got away from minecraft for a while. Kinda sad.
RP2 has become such a part of the technical and industrial side of Minecraft it tends to be everywhere. It is a great mod, but people tend to be blind to the problems. It has been around for a year and a half now, and the author herself still calls it a pre-release. There has been exactly four updates to the mod in the past year, and two of those were bug fixes. There a bugs that haven't been fixed forever, there is little to no integration with other mods, no public Redpower API I know of, and Elo actively discourages interfacing with her mod in any way. The mod author has always been reclusive, and has gotten more so as time goes by, to the point even her testers and friends have lost touch.
If you ignore the name, would you use any other mod that had a history? Would you use any other mod that caused this much drama simply by existing?
I think it is time FTB got away from the drama. Fork the packs. "Here, for those that want to keep RP2, these packs will stay in 1.4.7, forever. For the rest of us, starting from 1.5.1, these new packs no longer contain RP2, nor will they ever." Gets away from the drama, yet still allows those who want to keep RP2 to do so. Best solution, I think.