New weaknesses.

Understandably, Abyssea has fostered one of the more undesirable aspects of the community via the weakness system and cutting things down to the smallest number of people possible to access the desired triggers for the most loot. I like the weakness system, but at the same, dislike the job discrimination this has caused. As such, I would like to propose additional triggers that would work on top of those currently present.

Orange:
The mob is drastically slowed and its casting time is increased by 50%.
For players, this ups Key Item rates to 50% and gives half the rate a Yellow would.
Suggested triggers: DNC steps, Quickdraw abilities, Bash abilities.
Discernment hint: "The target appears to fear <job hint(s)> abilities."

Purple:
The mob is inflicted a powerful plague debuff while the parameters calculated for their TP moves are also diminished. (Say, 1000 Needles from a Cactuar would do 750 while this was up)
For players, Key Item rates are upped by 50% and you get half the boost of a Blue trigger.
Suggested triggers: Automaton WS, SMN Blood Pacts, BST Jug Sic moves, offensive Wyvern breath.
Discernment hint: "The target appears to hate servants of <pet job>."

Green:
The mob receives a significant MATK/MACC debuff and temporarily forgets some spells in its arsenal.
For players, this will give 50% of the effects of Blue and Yellow triggers.
Suggested triggers: SCH Helix spells, T2 Enspells, DRK's Absorb spells.
Discernment hint: "A <job>'s specialty magic might be effective."

Some of the above are rather broad, and classifying some might even be tricky. For SMNs, I'd make their level 70 BPs the triggers by day. The BST triggers should involve the new jugs added since the cap increase, perhaps their most expensive offensive move. Automatons could involve their later learned WS.

Otherwise, stacking Blue, Purple, and Green could yield a 200% increase to a mob's Blue classified loot. Yellow, Green, and Orange would do the same for yellow drops. Red, Purple, and Orange could guarantee an abyssite upgrade from the various VNMs. If you're industrious enough to trigger ALL weaknesses on a mob, they will give every item and KI they possibly could, and perhaps bonus loot like an additional 1-3 magian items, be it for armor or weapons. As a further bonus, a Primeval Brew could be awarded to all in the party/alliance at the time of death. If that's too much, a lesser version of the brew could be added with 1/2 to 3/4 the potency.