Had a bit of a look back again at discussion around the #Rails leadership problem, and it seems clear that the Rails Core team is 100% on board the DHH train - there seems to be no dissent at all.
So I guess asking them to take action is pointless, and a complete fork is the only way. I wonder if there are many ex-Rails core people out there who would be willing to step back in to help get a community fork off the ground...