You will release the script changes sided with the voice over project, right? Not as a single package I hope...
These good old non-voiced games are awesome the way they are, and we pretty much picture their voices in our own way.
Just the fact that you put voices where they were none may sound very weird and confusing. Adn if we don't like one of the voices, or were too far off how we imagined it, the experience will not be that good.
Thus I ask you to release each feature as optional so we can choose what to use.
The translation corrections sound awesome. And added content also sounds great. There may be quite a few ways to fix/improve the story. The Quistis returning to apologize scene for example may be changed to "Hey, there were some awesome lemon cookies in the mansion, how about we go get some for the mission?" or "Hey... That Rinoa card in the table wound be amazing in my Queen deck, wonder if the general would trade it for this Ifrit card?

Just kidding.
Keep up the good work. Looking forward fot this mod.