The character models themselves are fine. They have good proportions, they can be plump or thin depending on how we design the character. Faces can be shaped to (mostly) whatever you want. And they also have more polygons than other competitors so you can't really find better alternative models out there, except going Genesis 8 or 9 which would increase the poly count even more which is already high enough to my taste. If you don't like the girls in the picture, you need to understand this is just one possible face among thousands of other possibilities.
Materials could get some work but even in the current state, I still think it's adequate enough for a porn game. In high quality, textures are 4k, come from Daz themselves and up close, have a good realistic feeling, at least good enough to my own taste. The exception is the current hair and beard shader which needs some work but I already tried several hair shader without satisfying result so I put that on stand by until I get more familiar in the topic.