The concept of the Change wasn't a human/alien hybrid. Rather, it is that the Alien "lifeform", as a fundamental principle, gets more invasive and efficient with each experiment.
What's going on in the story is pretty simple: in this Cold War-like zone of outer space, both the commies and the capitalists obtain some samples, and they use it to run experiments. Said experiments become a highroad for the "lifeform" 's quick evolution.
I get you may have preferred some Resurrection-like hybrids here, Kurai, but it's just not the idea behind the Change. You aren't looking at humans merely contaminated by alien genetic experiments, you are looking at a fundamental principle devouring humans and replacing them.