Of course Hanya would take advantage of these parasites. She still ate people before, but now she can do it without being poisoned.
It's ok, her power and cruelty has become kind of an attraction of the game so it won't drive players away. Some say the devs even think of ways she could abuse the new features before they implement them on new updates.

I'll end the parasite arc here before it gets boring. A fun week-end this was.