Yeah, but hopefully they can still provide a bunch since most of the main character's dialogue is text based. So they won't need to record the thousands of lines of dialogue like they would for a fully voiced NPC. Just mainly combat sounds and the little quips that the character makes during exploration. Also, those rare occasions when the character does speak during cutscenes, but they seem fairly rare.
You can also probably use the same voice actor to do a few different soundsets. Whether by using their skills as a voice actor to change their voice completely or just by changing their tone to represent a different kind of character.
At the very least, I do definitely expect more than what we currently have. Didn't Original Sin 2 have more options than this?
