It is not impossible that both Origins and Tav will be fully voiced when the game is complete, and some answers from QA could have hinted at it, but it is definitely not confirmed. Ther eis a bit I run into in my last playthrough of Tav having his lines voiced during a cutscene when you run into dying true soul. Is it an odd exception, or an example of things to come?

Not something I support to begin with, but then again it applies to many decisions made for BG3.