I don't want to be a party pooper, but forking rA was a mistake in the first place and foking it further is an even bigger mistake. Splitting the dev team and the community only makes it harder to implement things and fix issues and eventually will lead to community wane and finally total die off. I know that starting something new is much more exciting than fixing the old thing, but I can assure you, the latter is much more rewarding on the long run and that is the only way to improve something effectively. Every project has it's ups and downs and there are always new ideas that might be a bit against the project's aims but everything can be discussed and worked out.
Anyways, this is only my opinion.
Have fun and good luck!