This sounds promising. I have some comments though.
- When you say "easier to play", do you mean lower difficulty, or enhanced interface? (Or something else ?)
- Is it really necessary to double the movement speed? I mean, the game is all about the dungeons, where a few missteps can cost you your life...
- I would be careful about balancing the different classes. I believe total perfectionist balance has a tendency to degrade games (just look at TF2).
In FF1, the difference in power between the classes isn't really that big a deal, since you only get to choose classes in the very beginning. After that, you just have to make best use of what you have. Everyone knows Fighter is overly strong, yet people never start out with 4 of them anyway. It is much more common to choose a party suitable for your skill level, so the game's difficulty will be adjusted towards that. With total balance, challenges like White Mage SCC wouldn't be any fun at all.
I'd suggest keeping the classes at differing power levels. Weaker classes can be given other abilities to make up for it - such as higher HP growth or the ability to escape easier (you'll need to fix the Flee bug for this). Then again, maybe that is what you had in mind?
I also suggest you:
- Fix all known bugs
- Make all the different character stats useful in some way
Other than that, this looks to become a good hack.