Though its last installment was implimented in the game nearly five months ago, the Abyssea add-on battlefields will be seeing new changes made in the upcoming version update. Items for Empyrean armor will be obtainable from other sources, light values will no longer be a guessing game, and the list of Blue Magic spells for triggering Notorious Monster weaknesses will be adjusted.

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From the official Final Fantasy XI forums:

Abyssea Adjustments
The upcoming major version update will see the following adjustments made to Abyssea:

• New Ways to Obtain Empyrean Upgrade Items
• Empyrean +1 seals will be made obtainable via new battlefields.
• Empyrean +2 items will be made obtainable from notorious monsters in additional Abyssea areas as follows:
  

  • Heroes of Abyssea area items will also appear in Scars of Abyssea.
  • Scars of Abyssea area items will also appear in Vision of Abyssea.

• Visitant Light Status
  In addition to visitant duration remaining, players will be able to inspect their active lights when healing.
• Notorious Monster Weaknesses
  The following blue magic spells will no longer be effective against enemy weaknesses:
  Death Ray / Blitzstrahl / Hecatomb Wave / 1000 Needles / Frost Breath / Firespit / Regurgitation / Seedspray