Are you going to change some characters' availability? Because some people (Lucia, Tormod's group, etc) could really benefit from getting some extra chapters.
Some suggestions:
-Give some characters extra chapters to play in, as I mentioned. Lucia and Elincia could join along with the CRKs (actually, maybe you could change the CRKs and Lucia so they are playable during 3-10, so they have a chance to get some extra EXP), Tormod's group could join on 3-1 or 3-2, Ena could join on 4-1, Jill and Fiona could be made available during 1-8, Pelleas could join on 3-13 if he doesn't die, stuff like that.
-Buff magic. Most Tomes really need some extra MT, and some more uses wouldn't be too bad either (it's mostly the Siege Tomes and SS magic that need the extra uses).
-Make the NG+ bonuses available in a normal NG (most people that will play this likely will have already played the original version once, anyway).
-Maybe give some weapons extra uses as well (like making ranged swords/axes/lances have 25 or 30 uses).
-Add more enemies with higher levels to part 1 (including some T2s starting around 1-6), so there's more EXP to go around. Maybe promote a good deal of part 2's T1 enemies as well.
-Make Sothe, Volug, Tauroneo, Tormod, Muarim, Vika, Nailah and Rafiel not forced in the chapters where they're forced.
-Change Shove and Canto's cost to 0.
By the way, how did you get Nightmare to load the game? I couldn't get it to load it.
Good luck with this project.