Using that logic, I could take any mod add a few things, change it and redistribute it and the original author can do precisely nothing. Try doing that with RP2 and see how much the community likes you. This is the real issue to me, it's ok for some people but not ok for others.
It's also worth noting that IP holders don't always get involved instantly, there have been projects that never saw a release after years of development because a cease and desist order showed up one day. They may not care now, but that may change, because the Mojang of today may not be the Mojang of tomorrow. Odds are, it's all a formality at this point and I think odds of there being huge changes to the pack are very slim (I can only speculate, I haven't seen the conversations and I'm not an FTB dev.)