Abyssea indirectly addressed a major problem for BLM: MP recovery. BLM spells use an ungodly amount of MP. In Abyssea, Atmas (specifically Minikin Monstrosity, since I tend not to use any other Refresh Atmas) breathe new life into BLM and alleviate some of the hassle of MP management.
Before Abyssea, playing BLM involved an excessive need to rest and to manage MP. BLM has a wide array of powerful nukes, but outside of Abyssea, I regularly find myself choosing not to use BLM's job-defining spells in favor of conserving MP for Sleeps and Stuns. A resting BLM cannot effectively Stun anything!
Mana Wall and Enmity Douse were both fantastic additions to BLM, but I hope to see more adjustments. Like SMN and PLD, I hope that BLM will someday have an Auto-Refresh Job Trait. It doesn't need to be as powerful as Minikin Monstrosity's Refresh effect, but a natural Auto-Refresh Job Trait around 3 MP/tick or higher (at the level cap) would be a tremendous boon to BLM.
The Refresh spell and Refresh gear can only do so much. An Auto-Refresh Job Trait would be a simple, effective, and greatly appreciated adjustment to BLM. Abyssea Atmas finally allowed BLMs to actually play BLM, and I for one would like to continue playing BLM (instead of playing Resting Mage/Sleeping Mage/Stunning Mage) outside of Abyssea.