Still going through my first run of BNW (1.9). Finally got through the Floating Continent.
Now, up to this point I have to say the mod has been pretty fantastic. There's some questionable dialogue or enemies here or there (too much "learn which enemies counter physical/magic and don't do that"). It has been very interesting to see formerly useless characters like Locke and Cyan become OP monsters, but I'll make another thread like that. For now, I just want to give you some feedback on FC.
Floating Continent is the first point where I thought the mod is a straight downgrade from vanilla. The high encounter rate with stronger enemies makes it a slog, and you really don't feel like exploring to find all the treasure. Atma Weapon is insane. I think I spent three or four hours on that thing with Terra/Locke/Edgar. Yes, I could have just spammed Ice 2 with Strago, but I don't like Strago. In the end, I realized that I hadn't checked Shadow's esper, and sure enough he learns float (doh). That made the first phase trivial, but the second phase is just way too RNG. Each Mind Blast and Meteo is a potential game over, and both Glare and the Raid+physical combo could one-shot anyone. If you try to heal someone who gets killed, it wastes a turn and then you're REALLY in trouble. In the end, Meteo and Mind Blast didn't give me an instant game over, and I managed to get enough damage in with morphed Terra. I'm all for boss fights that take a few tries to figure out, but this was just way too much, and each try took way too long. It would be a huge roadblock for less experienced players.
As for after that...which one of you has the mega hard on for Celes? I like the idea of fleshing parts of the story out more, but that was fanfic-level cringe. She never struck me as a brooding, borderline emo-type character. Giving her Leo's sword (with shock!) was a cool surprise (wasn't it Kefka's sword though?), but the short timer ensures that you'll die the first time when you're still figuring out that the whole sequence has been converted into a big Celes blow job.
Finally, in WoR, after three attempts, it seems impossible to save Cid, resulting in a back-to-back Celes drama double whammy. I get that you want to put a little more focus on her character since vanilla kinda just throws her at you, but the way you went about it made her a lot less likable to me, and cheapened one of the most important parts of the game.
Consider returning to the original scenario for the FC, but keep the sword.