We would love to see NAT64 support in VyOS. This would allow us to run everything on IPv6 internally while being able to talk to IPv4 hosts outside of our network.
Here are some unmaintained implementations:
http://www.litech.org/tayga/
http://ecdysis.viagenie.ca/
This one seems to be updated last year:
https://bitbucket.org/xHire/wrapsix
This one is maintained and seems to have the most features:
https://www.jool.mx/en/index.html