When I did the symbolic links, I was linking Cache, Data and Interface.
The WTF, with all of the settings was not linked.
It was easier to maintain a single interface folder for addons.
And only worry about updating one folder...
And then just check which toons used addons and which did not.
Then to have some addons in each folder of wow.
IS Boxer has virtualized config files.
Which gets me everything I wanted from symbolic links.