Ideally, a bit more controlled chaos, and a bit more things to press, if that can be done without bloating. Possibly a bit more attack speed.
Ability redundancies consolidated, button-wise (FC and IB, SC and Decimate).
Ability-based healing to scale with Defiance, Convalescence, and Mantra. Equilibrium reduced to 900 potency to compensate. (Does 10% less on average, but 5% more with Convalescence.)
A Rampage ability. No idea how it would work, but I want something of this sort.
Possibly a Fracture revision to make it not just another lame DoT. I don't mind using it at 4-5 stacks of Abandon, but it otherwise feels really lackluster, even as a 300 potency ability, given that it doesn't give any stacks.
Possibly a Inner Beast revision to make it more useful when the damage taken is little, such as by perhaps granting a combination of Defense and self-healing for six seconds based on your current health (the higher your %HP is, the more Defense it gives but less healing), making it more useful for healer-less scenarios. Over the duration, any self-heal over-healing you do extends your maximum HP for 6 seconds, at the end of which it fades over the next 6 seconds. (Would like to see some PLD and DRK self-healing buffs to balance this out.)
Maybe something like a Steelguard ability, that would excel for taking numerous small hits for increased MT damage thereafter.
Some kind of deadlock ability, like a channeled stun, where you can continue a flurry of accelerated autos while holding the enemy's weapon in a strong bind or outright holding the enemy off the ground with one arm? Ehh, nah.
Raw Intuition doing something more interesting than just 20% mitigation with a side of Don't-Let-Shit-Get-Around-You-Without-Awareness!! (?)
Honestly, the job is just really solid already. I don't find it quite as fun as DRK when DRK's owning its mana generation capacity, but it's pretty great. Honestly, so much I would like to revise for DRK, or even PLD, but hardly anything for WAR.