No, userspace NAT is the next priority I think (since wek has a solution for it it "just" needs to be integrated [which needs a major redesign of the whole backend...]).

But if it's important to you feel free to start experimenting. Best way to get features you feel important is to figure out how to implement them and then supply patches...

I spent over a week in the futile effort of trying to get working kernel-space NAT for stock kernel when starting this project, (learned at lot while at it though) wek and qole have spent a lot of time on the userspace NAT solution. No need to be expert outright, willingness to learn and to spent some time at it will go a very long way.