There's one more issue that I'm personally noticing, btw: Akamai latency is all over the place (using 2d DNS), and I'm seeing dropped packets on IPv6.
A couple of MTRs, first for IPv4:
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
1. router.lan 0.0% 21 0.3 0.3 0.2 0.3 0.0
2. v1.akmod-bng1.tranzpeer.net 0.0% 20 1.8 2.5 1.8 4.3 0.6
3. (waiting for reply)
4. a104-98-3-67.deploy.static.akamaitechnologies.com 0.0% 20 71.0 70.4 69.8 72.8 0.7
And IPv6:
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
1. 2406:e001:2:9e00:6e3b:6bff:fe1c:3ed0 0.0% 36 0.3 0.3 0.3 0.4 0.0
2. default-rdns.vocus.co.nz 2.8% 36 2.1 2.3 1.7 3.6 0.6
3. (waiting for reply)
4. g2600-1415-0018-0000-0000-0000-6860-a9b1.deploy.static.aka 0.0% 35 2.7 2.9 2.1 4.3 0.6