I think it will take more then 1 big patch for them to fix the game, I expect 1.18 to be good and add content and fix things but alone that will not be enough.

But them charging before at least another 4-5 big updates would be a bad thing. People cannot come back to the game and hate it again or square is screwed. There are alot of people waiting on square to say ok we fixed it to give it another go.

Honestly square cannot just make this game good, they have to make it great or they will not recover from the launch. If I where them I would not charge anyone until ps3 release. And release ps3 with the first expansion and give the pc players a free download of it. Then charge. All the changes and a whole expansion of goodies should be more then enough content to qualify for a completed game.