1) Characters more interesting.
2) Different storylane
3) Good ol' moogles back...
Did you miss the Moogles in the game or something? Because they were in, with more of a mention and showing, and they were more important then ever before, plus still they were cute.
What do you mean by a different storyline...? This storyline was different, there was nothing too bogged down by romance, plus it wasn't a generic save-the-world-from-destruction saga.
Megalo - Why replace Fran? She was important enough to be storyline based. Doesn't make any sense to put Montblanc in, seeing as he was just a minor character.
S - it was confirmed already that Balthiers father was Cid, there was enough hints anywho.
Kourtney - Ghis was male. Drace was the one you were probably on about, the female judge.