The Greeks valued free will, but how did that work out in Antigone? Given what each character represented, does free will seem valuable, or...

My apologies for not bringing in specific text from the play to further explain my answer. I'll do that now. 

Free will comes with consequences. Antigone, from the beginning, has not even considered leaving Eteocles unburied. As Ismene points out, she has the choice, but to Antigone, there is no choice: "False to him [Eteocles] will I never be found." Of course, for Antigone, her free will ran up against Creon's unshakable resolve to leave...

My apologies for not bringing in specific text from the play to further explain my answer. I'll do that now. 

Free will comes with consequences. Antigone, from the beginning, has not even considered leaving Eteocles unburied. As Ismene points out, she has the choice, but to Antigone, there is no choice: "False to him [Eteocles] will I never be found." Of course, for Antigone, her free will ran up against Creon's unshakable resolve to leave Eteocles' corpse for carrion, so how it worked out for her: live burial (where she hanged herself, rather than starve to death). But she did have free will. She was a martyr for her beliefs. She didn't have to bury her brother, but she made a choice and accepted the consequences. 

Consider Creon's free will, as well. He could have changed his mind--allowed himself to be swayed by reasonable arguments--at any point, yet he chose not to. He allowed his ego to cloud his reasoning: He had said anyone who tried to bury the body would be killed (although he began with "stoned," and altered it eventually to live burial, something the Greeks sometimes did to absolve themselves of responsibility for a state-sanctioned death), and by golly, that's what he'd do. Otherwise he thought he'd be perceived as a weak ruler, ruled (no less) by women (egads!). 

Given the characters and their outcomes, it's undeniable that free will is valuable. Imagine being denied the right to bury your own father (say) because someone in power insisted they had wronged the state, what would you do? Particularly if you believed that God (or the gods, in this case) would hold you accountable for breaking a higher law than that of the state. 

Or...is the world that Creon represents the better one? Never. He may be a just ruler in many aspects, but he is, in this play, a tyrant. He is unwilling to listen to reason or even be swayed to mercy. We have countries like this in the world yet; they are the ones that have to have walls to keep people in.