* Ditch v2 ASAP (seems like you've already decided on this). It's pretty obvious you aren't motivated to work on that codebase anymore. I've looked at v3 and it's much better thanks to relying on Rake tasks.
* Be selfish. It's your project so if you think v3 is the way to go forward, go with it and who cares what the "community" thinks.
* Seems like you already have a few people helping out, so continue and maybe make formal "core" team. There's nothing with yourself taking a step back from the heavy coding. But I believe that Capistrano would be better with your guidance than without it.
codebeaker: There was no mention of Harrow in that post. Are you still working on that? I'd assume that if you were you'd continue work on Capistrano since it's based on it.