Icemaush: Yes I would very much have liked to see some more of Montblanc. Or have him actually assist in some more important hunt, that would've been so sweet. I really really loved Montblanc in FFTA. Strongest Moogle Black Mage there is. Kupo~

Toxo: Yes I agree to the fullest about Penelo and Vaan. But I think underdeveloped characters are the main flaw of FFXII. When you read more into it, you gain a grasp of for instance; Balthier and Reddas past. But when it comes to those little details that really makes the characters, their interaction to eachothers, fun little facts about how for instance, Balthier ever met up with Fran and vice versa - there's very little of it in the game. I really missed seeing Balthier boss around with the selfproclaimed aprentice Vaan, for example.
Don't get me wrong, I LOVE the characters of FFXII, but sometimes it feels like most things on the characters, are only made up in my mind. It's there in the game, but never really portrayed.
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I don't know if I've already mentioned this, this thread is sort of old now - but Al-Cid would've been so sweet to have on the team, just for the sake of his delicious hairy chest and outrageous voice actor.

I wanted more Tomaj in the game as well.