here's my philosophical 2 cents:
personally i'm an advocate of NOT having it available, my interpretation of "mind control" only allows for the manipulation of the motor control section of the brain and receiving data from the information processing center but disallows access to higher functions, like the personality and memory centers. for example, surely if we had access to the "memory" or "personality" centers of the brain, we'd be getting free research from mind control. i can't say FOR SURE which part of the brain would be "responsible" for psionic actions, but i have to imagine that with such low-level access to the brain, such manipulation would be out of the question.
the puppet master can make his toy dance, but he cannot make it think.
so for example, a mind controlled human may be screaming (or thinking, if he can't move his mouth) "oh god, help me! i can't stop it! look out! i'm so sorry! RUN!" while he methodically shoots each of his friends in the face. this is a much more horrifying scenario to my mind, and is accurately represented by the impact on the morale of the mind controlled unit. basically the mind controlled unit would be "trapped" in it's own body, unable to do anything but watch as it's own hands carry out the actions.