Just got/reflashed my Netgear 3500L with "Tomato v1.28.7446 MIPSR2-Toastman-OriginalClassNames K26 USB VPN". After struggling abit with dhcp on wan being a pain. It's seem to be working fine now (had to clone my old routers MAC)
Sadly the one feature I explicitly used that "beta" version was ipv6 support. Now I apparently didn't research enough, but my ipv6 of choice is 6to4 tunnels. This worked nicely on the stock firmware.
So me humble feature request is ipv6 6to4 support. The setup of which was insanely easy on my ISP/network.
I suppose i could also add an additional feature request in regards to ddns together with 6to4 support. Being able to ddns update a client system behind the router on a public ddns server since all those ip's will change aswell when the public ipv4 ip changes.