Final Fantasy Tactics A2: The Sealed Grimoire review at Siliconera.

"The first Final Fantasy Tactics Advance received a lukewarm reception among fans; some appreciated the game's depth with its job system and customization as well as the whole clan concept, others disliked the game's lack of a deep story like Final Fantasy Tactics and detested its lack of a consistent job system. It's true that Final Fantasy Tactics Advance never had a deep story, but its gameplay (especially its job system and clan missions) more than made up for the lack of a story about war, betrayal, and honor. Final Fantasy Tactics Advance 2: The Sealed Grimoire, the next entry in the Tactics Advance series, manages to rectify the many issues fans complained about in the original game while creating new complications of its own. If you're expecting A2 to have a deep story, then you'll be sad to know it completely lacks one. However, there is a difference between the story of both; the Ivalice Luso enters, after being sent to clean the library for misbehaving in class, happens to be the real Ivalice where Vaan and Panelo live."

Full Source: Siliconera