1. Gwen is absolutely a mind controlled slave - after being zapped by Awaken she did not only become instantly attracted to the MC, she forsake her previous beliefs, betrayed her former comrades and even went as far as trying to sacrifice herself when the Beast appeared.I feel weird lecturing someone on porn plot but here we go. You got that half right. Or a quarter right, whatever.
Awaken did make Gwen head over heels in love with the MC (not a sex slave, that's a detail but still wrong) against her will. That is true.
That's not what it's supposed to do, however. Gramps told the MC exactly what Awaken does and that Shatter is a piece of it that's broken off. Technically they are one and the same, or they're supposed to be. That's partly why Awaken did not work exactly like it should have on Gwen. That and a huge surge of power the MC got in the lab and not controlling his powers well yet.
The game is about a lot of things. And your opinion that it's about mind control is valid. You may even be right. But that's not what I think it's about. I want the game to have a happy ending and the MC be a hero. Will it happen? I don't know. But I want it. And I'd like people not to judge me for that.
2. Gramps was pretty vague in his explanation. He also said Awaken will make people worship the MC and that "theres no limit to its versatility". To me its clear that Awaken is a type of mind control just with some extra conditions. MC brings out only those thoughts and desires which could be useful and then molds them however he likes. Im not gonna argue this further, you can think of Awaken as instant psychotheraphy if it makes you feel better