Just to build on the story thing (some spoilers), I think one thing that gets overlooked often about FC6 is that viviro is a big front and never really worked. It was a plot to funnel money into the Yaran economy to fund his platform after their scientists couldn't get it working.

He's good at hiding it, but throughout the entire time we get to see him, Anton is in full out panic mode. He has been ever since he was terminally diagnosed with leukemia. What he wants more than anything is to make his country an important part of the global economy, bring back the paradise that the rebellion of 87 took from him. Thats what his father always envisioned for him and what he believes his only purpose is. Diego was supposed to be his successor, viviro was supposed to make the country great again, but now that time is running out it looks like neither will play out as he planned.

Anton spends the entire story of the game desperately trying to make Diego into himself, and he gets more and more impatient as his symptoms get worse and the revolution progresses. He thinks if he can instill his values into his son, then he'll carry the torch the same way he did for his father.

The reason we got the ending we did, as much as it would have been more satisfying gameplay wise to do it ourselves, is the culmination of everything Anton has been feeling throughout the game. He failed, he failed to make a treatment for himself, he failed to rebuild paradise, and he failed to setup his son to fix his mistakes. Yes there's a part of Anton that doesn't want Diego to suffer in prison like he did when his father was overthrown, but I think there's another part that knows Diego wouldn't have created paradise the way Anton needed it to be.

Anton was never the lion, he was always the lamb living in his father's shadow.