Quote Originally Posted by Lusty Justy View Post
In Final Fantasy VI, the World of Balance cannot be reached once you are in the World of Ruin. I don't think it's plot is held back at all by this incident.
Transitioning to the world of ruin doesn't lock you out of every area in the game aside from the final dungeon. In fact, I can only think of a few things you can't revisit there, but they're usually places you would have little to no reason to revisit, and a lot of new locations open up as a result of the transition. Pretty much the opposite of what happens in FFVIII.