I recently decided to start a new playthough as Lohse and to my surprise, when she goes to the Hall of Echoes to visit her demon, said demon's voice is now very much her own voice. I suppose Larian changed all the lines that the original voice actor would deliver during the encounters with the Eternal Aetera, the Sallow man, maybe even during Jahan's exorcism attempt (with Lohse as a companion in this case) as well.

I don't know why they decided to do this, but they could at least let us have the option to choose to keep the demon's voice as it was before, since they've made a change like that AFTER releasing the game.

I personally find it immersion breaking and really cheap and disrespectful to the original VA, who was terrific by the way. What's more, this change wasn't announced anywhere in any of the newer patches, so it looks to me like an attempt to sweep something they didn't think was important to the fans under the rug.