I do like Ivalice. I think it has the next richest lore overall, albeit possibly conflicting presentations due to cameos and themes. Agreed on FF12 being like an offline MMO. The characters didn't have a very strong feel save maybe three of them.

Being in Ivalice, I was kinda hoping it would have a more interracial cast instead of hume and viera, but bangaa, moogle, nu mou, seeq, gria, etc.

Ivalice conflicts:

Final Fantasy Tactics
Final Fantasy Tactics Advance
Final Fantasy Tactics Advance 2
Final Fantasy 12
Final Fantasy 12: Revenant Wings
Vagrant Story
Crystal Defenders