Well, even if they don't fix custom voices ever, I only hope they change default voices to something more suitable to the characters, most of the voices are kind of childlike, default valkyrie sounds like a 10 year old would, while the new face looks 20ish.
For real, warrior's default voice is too crappy, needs to change.
I wouldn't say Warrior's default voice is THAT bad, Dark Knight and Valkyrie sound completely off, it's not just they sound like children, but the voice acting itself is very low quality and absurd.