a "good one"...?

How do you define what makes a plot "good" or bad"...?

For me Sin destroying humanity was a good plot.If others feel differently that's fine.

I realize some people are tired of the "world is in danger" type of storyline but I happen to like those.
Saving the world/saving humanity is in my view a worthwhile endeavor.

That's just my opinion though.

One problem I have with FFXIII is the notion espoused apparently by the socalled sanctum elite is that i'cies are a threat to cocoon.To the people of cocoon.I don't see it.I see them more as at risk people .They're at risk of becoming either crystals if they succeed or zombies if they fail.So they're more at risk for taking assignments from the falcies than they are any risk to ordinary humans imo.