As per above.
Here is a reddit translation of the Live Letter info in regards to job adjustments.
Summary: DRK - No adjustments for Dark Arts, Potency increase, Defense portion increased, usability improved (8 items), Plunge buff, animation cooldown will be reduced.
MNK - Enmity supress skill will be added, though the trade off is firepower when used.
SAM - Potency increase. Basic combo potency increase. Adding enmity control in one of SAM's skills, also hints on some others.
NIN - DD based usability will be adjusted (DD is assumed to be Deep Dungeon in this context)
BLM - Aetherial Manipulation and Between the Lines animation adjustments.
SCH - Pet usability adjustments
AST - Attack based spells cast time reduced, Lightspeed MP reduction effect from 25% to 50%, but damage inflict down effect will be removed. Aspected Helios will be buffed._________________________________________________________________________________________________For Japanese speakers, you can also peruse the 5/11 Nekokuma interview, though the information is nearly identical (a bit less vague in some points).
Here is my attempt at a translation for said interview:
Patch 4.3 Adjustments/Tuning:
- Consult the 4.3 patch notes for fine details.
- Provides tuning/balance adjustment for 7 jobs, DRK, MNK, NIN, BLM, SCH, AST.
DRK
- We were unable to make any fundamental changes with this patch, but we've tuned and fixed up as much as we can for now.
- Many have asked to make Dark Arts easier to use, but we'd like for you to continue using Dark Arts as Dark Arts.
- 8 actions have been adjusted through increased strength, defensive strength, or convenience.
- We've buffed Plunge. We've shortened the animation lock following its use.
MNK
- Since we've added a enmity-suppressing skill to Samurai, Monk will receive the same. However, we'd like for it to be one where the Monk must really consider where to use it.
NIN
- No [changes] related to actual power, only to ease of use. These [changes] should be fun to see in the context of the new Deep Dungeon.
SAM
- Purely and simply, Samurai's raw firepower has been increased. Basic combo weaponskills have been buffed. 5 actions strengthened in total.
- We've also added an enmity suppression effect somewhere into Samurai's toolkit.
BLM
- Movement speed caused by Ley Lines and Aetherial Manipulation increased.
SCH
- Pet independent/autonomous actions improved upon, but *["not by much" or "that's not all"]. (*Probably the prior.)
AST
- The cast times of attack spells have been shortened extremely.
- Light Speed MP cost decrease buffed by a further* 25% or 50%. Additionally, we've made adjustments like removing the damage penalty and causing it to also shorten recast times in addition to just the cast times themselves. (*Additive or multiplicative increase uncertain.)
- Aspected Helix buffed.
So, as for the purpose of the thread...
1. Where left vague, what exact changes do you predict?
2. Will these changes be sufficient for the balance and/or enjoyment of your class (where some ideal form of tuning or minor tweaks could have provided such)?