Believe it or not. Not everyone wants to see a Final Fantasy movie. Even some people who play FF 24/7 would groan at the thought of a FF movie. It's just too much story for a 2 hour timeframe. I don't think Square tried too hard to make FF:TSW a in-depth story, instead they went for lots of action, showing off how good they were at making stuff blow up with CGI.

Going back and re-doing everything would not be revamping the series. It would be holding it back. I'm sure Square hasn't run out of creative ideas just yet so I prefer to sit back and let them push on with the mainstream games and I'll just keep buying them and playing them and loving them.

Besides, game to movie conversions suck and blow 99.9% of the time.

*dances away*