It was not broken on purpose, I’m sure of it, and they can’t possibly tell what every tiny bit is broken vs v6.
That’s why you file bug reports, to report bugs found so they can put a number and a priority to it and consider fixing it in the future.
They’re putting a lot of work on other “router-like” features v7 Routing Protocol Status
You know, features that ISPs are waiting for to get stabilized in order to be put in production.
Socks, openvpn and other useless stuff don’t have that high of a priority.