I like that it's fully voiced myself, it was annoying in PoE that in dialogues suddenly you get something that wasn't voiced at all and it's just so random. Now you always have it, and if you don't like it you can turn it off, can't get more perfect.
I get why doing voices in a game like this is hard, because of the sheer amount of dialogue. It does a lot for the game though, I think. I also understand that adding new things will be more work too because now they got to add voices for it to match the text. In a pure text scenario they could add as much as the writers could come up with without the hassle of getting the voice lines there, and making sure the voice lines match up with the written text. Something that could be a bother if you have to edit the story and all.