I think most game studios are not aware of how much value a professional actor can add to the game, if the talents are well involved. "Here you are mate, read this. Bye!" Ideally, the actors ought to be in communication with the team writing the dialogue at an early stage. If the Art team and the Sound team haven't learned from the actors and incorporated this into the game, it is a waste.
I am pretty sure that most VO is done by professionals these days. Honestly, I doubt the quality of VO comes from actors competence, but rather from the process - game development is a fluid thing and actor has likely little insight into the actual game. If devs don't quite know what they want, or are doing recording in an overtime hurry, or keep changing the script it all might contribute to the final quality of the VO.
I will be honest - I don't think you want actors to have creative control over their work - their contribution are absolutely vital but one needs to accept, what the product is - just like music their work is complimentary to the game itself, rather then the point of focus.
Luckily, Larian's VO has been rather great so far. If protagonist has full VO, that is a decision that confuses me - not because full VO can't be effective, but IMO it goes against what an RPG should try to achieve. Or at least singeplayer RPG - I can absolutely see the benefit of the full VO in coop. But can we really have one voice for all of the races? Doing one voice per race and sex would be madness - but then it is Larian we are talking about.
