Honestly the Female POV was interesting and a fresh take on a format you've already done effectively 3 times. The bigger problem with Valkyrie I think is that it's missing the intrigue and deception angles that made Isis and Valdana more interesting than the standard corruption stories. Using the corrupted against their former allies without them realizing it was great (especially in Valdana, which did that better than Isis did due to the less dramatic changes in appearances and less reliance on the shut-off code), alongside abusing the altered mental state in the partially-corrupted in various ways to further the MC's ends, and I was expecting something like that in Valkyrie that never really materialized. It feels like a different genre from those games, which a lot of people (like myself) weren't expecting.
The obvious problem is that such an approach likely means few sex scenes in a game where that is a major appeal. The "Do a normal playthrough, then do it again with more scenes" approach was one solution to that, but honestly I don't think it worked particualrly well, even with Ren'Py letting me skip all the repeated scenes quickly.
