Ayvah;
If there is any chance some dialogue could be voiced, why design the system to preclude that possibility?

Even with fill in the blank name slots, there are still restrictions on how quests could be designed, or it would add significant extra work accounting for all the combinations of gender and race.
A simple name substitution could cause issues with localizations, as well (masculine vs feminine names, maybe differences in grammar).


Neonivek;
I didn't say it couldn't be done, just that doing it that way would put restrictions on how it could be done. That's fine if that is all there is; the direct comparison with specifically crafted characters, quests, relationships, etc, may leave such origins a little lacking.

Note that I have not actually looked up the current state of the origins, and haven't been following the writers' progress. They may have a different opinion on the value of writing specific origins around nonspecific characters.