Just because of deck numbers and visual effects, everyone loses their minds.
Not true. In the movie "everyone" looses his/her mind, swallows a blue pill and doesn't mind being brainwashed while the great Captain Kirk / William Shatner is the only guy with balls and a backbone and the ultimate philosopher:
KIRK: Dammit, Bones, you're a doctor. You know that pain and guilt can't be taken away with the wave of a magic wand. They're things we carry with us, the things that make us who we are. ...If we lose them, we lose ourselves. I don't want my pain taken away. I need my pain.
Given this strong philosophical message in the best TOS tradition, I'd almost be tempted to rate this movie "A".
Unfortunately, it comes at the expense of every other Star Trek character in order to "paint" the James Kirk character larger than life. That should qualify for not that much more than an "F".