I find it tiresome that we must have representation for the "good" exceptions of all the evil races. It's okay for the illithids to be mysterious evil shady bastards, that's their whole appeal. By humanizing them you basically dispel their mystique, and yes, by turning him into this helpful creature you did just that even if he had an interest in observing you.
Good specimens of an evil species are so rare that you are supposed to be able to rest easy about killing them without a second thought.
