I played the first game a while ago. Back then, and even now, I still maintain that it's one of the best games I've ever played, especially because of the story. I think it's definitely surprising, believable, and very entertaining and intriguing to play.
I've been very keen to find a good deal on the game so I can play this second installment. Regarding "There's not much to do," well, I don't know if you played the first game, but surely when you play the first game, the mechanics and the new adventures feel fresh. But if you're doing the same thing in the second, then this could happen, and you might only end up playing because the narrative is so good.
Note: Regarding the voice acting, I completely agree.
RE: A Plague Tale: Innocence.... first impressions