This discussion serves only to make me feel more excited about playing a TE only world. I had never stop to think about what KL said... We are asking to balance shit not because it is OP on their nature, but became OP on the environment we use, aka, a modpack.
It's even simpler than that. If there are "OP" (I hate the word, it is completely wrong in most instances) things created as the result of multiple mods interacting then it doesn't mean anyone HAS to use them. If they happily go ahead then they have no right to complain about the OP'ness of it. If someone is happy to exploit something they feel is OP, they are only cheating themselves at the end.