Here's some feedback:
So far, I appreciate the fact that you ignored Dadaluma and Tunnel Armor. They were there for gameplay purposes only and I'm glad to see them removed here.
However, it's a shame that you didn't use the opportunity in the Magitek Research Facility to switch the party a bit, introducing Gau's abilities. The bosses there have interesting points about them that can be taken advantage of to demonstrate the "status magic" from Siren's magicite (Number 024 is actually vulnerable to Sleep!).
Also, it's quite a shame that you completely skipped the Phantom Train. A good opportunity missed to shed greater light to Cyan's loss (and demonstrating Cyan's Bushido techniques so he doesn't look like Generic Samurai #343) instead of just reading it through Cyan's small chat.
I've noticed that there are some inconsistencies so far. For example, the key dropped from the Cadet in South Figaro was only mentioned when Locke's about to use it on the old clock (You should mention it when the Cadet gets owned). Another example is when the party encounters Vargas. You skipped the fight with Vargas' bears, yet Terra still mistook Sabin as one of Vargas' bears.
There's also a
slight problem with the fight against Kefka in Narshe. He doesn't actually use Fire magics. Instead, he's way more deadly with Blizzard magics, including Blizzara (Pretty much instant death at that point). Maybe you can be slightly more faithful to the source content when it's about bosses, as they're (mostly) quite memorable. Of course, you did say that you have creative freedom, so I can't really force you, but still...consider this a bit?
By the way, a typo:
Chapter 10 wrote:Celes passes out the magicite; Kirin to Locke, Cait Sith to Edgar, Siren to Sabin, and keeps Kirin for herself.