How would you fix FFVI?

[dominusnovus]

I dislike the idea of a character that grows more by not using him

Well, consider how Gau improves as it stands now. You don't actually use him; any battle in which he leaps or returns gets you zilch, other than the new rage. As it stands, the current system is incredibly tedious and random. At least Strago's Lores have some control over them. There's got to be a better way to do Gau's rages.

Oh, and quick idea on my World of Ruin scenarios:
- Umaro would be a temp character in Mog's scenario.