Wouldn't be better a new complete rewritten engine?

[Renegade]

Yes, that's true, of course - had we started years ago, we'd be done by now.
But had we started years ago, RockPatch would never have come as far, since the half the time would have been spent working on OpenYR, and Ares would probably never have happened - why waste time creating a C++ "patch" if you're working on a more flexible C++ game anyway?

You always have to see it in terms of work and capacity: Every work you invest into OpenYR is work that is not invested in Ares (or other patches).
If there were a significant force of C++-speaking volunteers who'd say "this Ares stuff is way beyond us, but we'd help with a plain clone", then it'd be a possibility - because we'd have the manpower to do it.
But as long as it's just us, every hour we work on OpenYR is an hour we don't work on Ares. And if neither Ares nor OpenYR is released, because Ares is developed slower, and because OpenYR isn't done yet, the community will not be happy.