I can't really test right now. Working on something else. But if adding talents with stats is not working, try with scripts. (I've successfully added all profession tags to all Origin avatars, and it works in the game, so I'm going to release that as a mod.)
Here are the Character GUIDs for generic avatars:
- CHARACTERGUID_S_Player_GenericOrigin_7b6c1f26-fe4e-40bd-a5d0-e6ff58cef4fe
- CHARACTERGUID_S_Player_GenericOrigin2_c451954c-73bf-46ce-a1d1-caa9bbdc3cfd
- CHARACTERGUID_S_Player_GenericOrigin3_41a06985-7851-4c29-8a78-398ccb313f39
- CHARACTERGUID_S_Player_GenericOrigin4_41a594ed-b768-4289-9f17-59f701cc6910
They are respectively named:
- Origin_Generic_1
- Origin_Generic_2
- Origin_Generic_3
- Origin_Generic_4
You could also try adding new character stat records with the same names.
edit: That probably won't work. I couldn't add tags to generic origins using those generic GUIDs.