It's all about effort the dev wants to put into creating the models. If they don't feel confident about creating one from scratch and would rather focus on the renders, story and coding, then I think that's fine, even if they leave them as they are after they purchased/downloaded them, as long as the rest of the game makes up for it. As somebody mentioned earlier, it's worse when people don't even put effort into story. Then you get the generic two room-sister-mates and land-mom-lady game, with models you've seen thousand times and at that point you are probably better off just downloading cg-rip.
Or you can have dev deciding to put a lot of effort into character creation, then you can't really expect good, non-generic looking models right away, because it takes a lot of practice. I know that well myself, because first XY models I made look pretty bad, with somewhat generic faces and no depth to them.
But in the end I think it's better to start working on the game with either not so great or just generic looking models, because the first game I feel is mostly about learning, not creating a masterpiece. And most of the games here are dev's first ones.
Point is, if it's dev's first game, don't judge it based on the models.
