I can see both sides. Less is more, but too little is perturbing. This is a party that, while originally forced together for whatever reason, ends up journeying across all Ivalice. While yes, there are clear connections between Vaan/Reks, Balthier/Cid and Ashe/Rasler, there's little in the way of genuine connection between the six core party members. The plot of XII is very much a deep, story driven narrative, and can hardly be labelled as character based, sans the little bits of interaction at key moments (which admittedly only happen after trekking through an area).

I don't expect the cast to be saccharine besties, but I do feel the game could have benefited with Dragon Age style party banter, if anything just to make the 'travelling' segments less tedious. It would be less dull listening to, say Basch, asking Penelo about her martial arts background while traversing the super dull Sandsea. Or Ashe and Balthier discussing recent events, anything. In battle comments could be done as well. If Penelo falls, hearing Vaan shout out her name or go "somebody help her!" would just make combat seem more natural, and maybe more intense. It's these small details of character interaction that really flesh out a cast, and for all FFXIII's troubles, the party felt like, well, a party. They talked to each other.

I love FFXII, but I do feel this is one area I feel let it down somewhat.