I'd hope they wouldn't waste development time on this. It's never done well and just ends up as a laughed at gimmick down the road. Your best bet is commissioning a modder to do it specifically for you as a standalone mod
Good point, if there are still cutscenes, V's face will be fully animated. This wouldn't work with a facescan. At least not with anything people have at their homesWould rather have to choose from a wide range of already existing faces that are expressive, with a full range of feelings, rather than have myself with resting V face.