Unfortunately I had to demote this device to just an AP and run my ZWave stuff due to lack of IPv6 support. Kamikaze definitely supports IPv6 and I am confident I could get it to work with some research/effort. I believe the only thing missing was the routing and radvd configuration. Instead I just grabbed supported router by OpenWRT and loaded the latest Chaos version on it and IPv6 worked out of the box.
It is unfortunate the Cortina couldn't stay up to date with the latest OpenWRT release. Securifi should take this as a lesson to pick a chipset which has some backing from the OpenWRT project.