You know if he is judging by the picture its funny to me because my first impression isn't that it's sexy at all....It's just plain sad, it feels kinda tragic. It makes me want to know what happened and how to fix it.
If she keeps it like that well I can understand the idea of greek sensuality. We will have to see how well that is expressed in game, and if she has been stuck like that for hundreds of years I would find it surprising if she wasn't a bit odd and working though such a major change. And if they are trying to make her into a real character, then that needs to be addressed. She can't just turn out to be normal and give the player a quest item. She needs to continue to show character and her past as a walking undead will undoubtable be a part of that.
As for the idea they "shrink the potential consumer base" though having a target audience well the truth is a game, or any product really, succeeds when it has a strong vision of its goals. Part of this is a target audience. A focus on said audience that has made successful franchises out of these games (including the divinity series itself) and so is a reliable idea for success. Not to say other goals don't work or this one works all the time, but you need a plan to make a successful...Well...anything really.