I could understand the complaints if this were a dedicated hard science-fiction story.
But it isn't. Not even Star Trek level hard.

Hell, this isn't even a soft SF story.
We are talking about a superhero kitchen-sink story with everything from Fantasy to Space Opera thrown in.

In a verse that has space-travelling, magic using, tinkering alien-demon-hybrids Dabbler interbreeding aliens are probably the least offense.

And, I mean, didn't we know this was possible since Dabbler?

And whats-her-name, the chick who got powers from touching people- lets call her Anti-Othala, it fits in more than one way -said something about her dad allegedly being non-human too.