OVN is 0.1 fairy dust and unicorn horns at the moment, looks very promising but you're most likely going to be waiting another 12 months before its solving your problems.

SocketPlane was bought by Docker and is now DEAD, to become whatever Docker decides is good enough to silence their critics. "See we bought these network guys, we swear we're taking networking and plugins seriously!"

I haven't seen those used in the wild yet, but fwiw, weave is working on a 'fast data path' that uses the same kernel path as ovs