Less of what I want and more of what I expect but:
-All of them get the exact same upgrade to their 30% defenses
-DRK and GNB get buffs to their sustain and party sustain to put them on par with PLD/WAR
-lv100 skill for GNB/WAR/PLD is a 2m finisher so they can operate on a 2m cycle like DRK and the rest of the jobs
-lv 100 skill for DRK is a buff to its 1m Delirium buff pushing it towards a Gnashing Fang or confiteor
This is about as safe and mundane as you can get and so far its looking that way.
I'm also guessing they're going to try to solve crit varaince in some way, could either be through stat changes, or by making all big finisher attacks guaranteed Crit/DH.