SCH should be able to reveal HP bars

[Kfox]

This is fairly limited however, I think SCH should be able to reveal the HP bar on monsters that it is hidden on. Seems like something that would follow the past mythology of the Scholar.

[Arcon]

They mentioned they were gonna give SCH a more detailed ability to determine monster's stats, although they didn't reveal the extent. At least it's a step in the right direction, seeing how Libra is largely useless.

[Ninian]

They should allow Libra to also show monster weaknesses (like !! procs in Abyssea, Dynamis and Voidwatch).

[Yukichibi]

Source:

http://finalfantasy.wikia.com/wiki/Libra_%28Ability%29

Libra (Ability)

"When it comes to technicks, no adventurer worth his salt would leave house without Libra."
—Rabanastran, Final Fantasy XII

Libra (ライブラ, Raibura), also known as Scan, Peep, Analyze, or Sense, is a recurring ability in the series. It is often a White Magic spell, but at other times is a separate command ability. It displays an enemy's stats and elemental strengths and weaknesses. In the later 3D installments one could rotate a scanned enemy around to see it from all sides. Depending on the game, some enemies are not affected by Libra, usually bosses or higher-level enemies.

In early localizations, Libra was translated as Scan. This was revised in Final Fantasy XII and the later Advance releases.

[Lordscyon]

Libra is a good spell on other final fantasy games that really shows the hp of the monsters but in ffxi it shows players enimity and i was like O.O there goes the taru dead...

[Oscar71]

Libra used after a set amount of time can be great to use allowing a warning to go off to other players when they should hold back or use their enmity erasing or dilution abilities, too bad its only localized to a party and not to an alliance.