Bad Export for You: Although the American version got a Superlative Dubbing, the skits didn't have any voice overs. They added new Mystic Artes and costumes not present in the Japanese versions, but most people agree those didn't compensate. This got repeated in the 3DS port.
Fan Nickname: Luke's Fan Nickname is Ambassador Asshat, for when he cranks up his Jerkass nature Up to Eleven as an ambassador to Akzeriuth. That's what happens when you give a spoiled rich kid authority and tell him that his freedom and the opportunity to work alongside his beloved father figure ride entirely on him doing an impressive job.
What Could Have Been: Apparently some stuff was discovered that suggests more stuff was Dummied Out. While quite a bit of it was restored for the North American localization (and the 3DS remake), among the things found were not only un-used Mystic Arte cut-ins but also Van to be playable at one point. There are quite a few unused battle lines (all of them dubbed in the english release) that are probably unused Artes, such as:
Anise's Valkyrie Saber, Dragon Rampage and Fang Shot.
Asch's Falling Dragon, Ravaging Hell and Binding Doom.