I'm just not sure this will be very popular. It looks like it expects a lot of complicated teamwork between the RTS and the FPS parts. If TF2 pubs have shown anything it's that regular people can barely aim let alone work in a team.
It might be great for competitive gaming, but will that be enough to keep it alive for long?
Unknown Worlds has obviously put a lot of work into this, it'll be a shame if the basic concept just doesn't catch on.