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.
That is completely true. This is one of the reasons I didn't like Lohse voice acting as they portrayed her personality as a teenager.
Even worse was Fane. His voice didn't match his character and his personality didn't match his history.
Apart from that, VA in DOS2 was generally good.
It seems to be a matter of taste and perception. Fane voice was perfect for me. Now Gale reminds me of something similar. They're both scientists, so it makes sense.
About voice main character, dialogues become more lively, for example, I rly like sarcastic Hawke from Dragon Age 2. But on the other hand this leads to limited responses, and I am against it. I love role-playing games for their variety! For games of this genre, it is normal when the main character does not have a "voice". Choices matter than voice.
