I think the Warrior stances might be made simpler.
My problem with them currently is that you have to use two different commands to change stances, because there's three states once you get Deliverance:
1)Normal
2)Defiance
3)Deliverance
But for all practical situations, once you have Deliverance you don't really need to be in normal stance anymore: Deliverance has no downside, adds 5% damage, and most importantly, doesn't reset your gauge to zero.
Now, if Warrior didn't gain Deliverance and its skills after the Defiance skills, there wouldn't be a problem: just make the DPS position the basic stance, the DPS actions the basic ones, and make them turn into different skills during Defiance. In fact, since PVP doesn't have such a problem, PVP Warrior is already designed like that. Only one button to switch between stance and no stance, and no accidental gauge dropping if you press the wrong one.
I think it's definitely possible to streamline the normal Warrior like that, but which changes would have to be done to skill acquisition to make it like that?
Skill acquired after level 52, obviously, wouldn't have to change much: in fact, at level 52, we could have Deliverance be a trait that gives you a 5% passive boost to damage when not using Defiance.
The core problem are Inner Beast, Steel Cyclone, and Unchained.
For Inner Beast and Steel Cyclone is simple enough to keep a setup similar to the current one:
Drop Fell Cleave to level 35 with a potency of 300, make it turn into Inner Beast when under Defiance, and make a trait at level 54 to give it an extra 200 potency.
Similarly, have Decimate at level 45, make it turn into Steel Cyclone when under Defiance, and trait it at 60 to give the extra 80 potency.
Unchained is a bit more complicated, I guess, since it has no overlapping effect with Inner Release. It would be possible however to have Inner Release at 50 with the status-nullify effects, make it turn into Unchained during Defiance, and add the Beast Gauge reduction effect at 70 as a trait.
These changes would boost Warrior a bit at lower levels (mainly between 35 and 54), but let's be honest, it's way outdated content, and there's been much greater balance changes in the past few months. Also let's be honest, playing stanceless Warrior until level 50 is a drag, it's literally just doing the same combos over and over without a gauge. Plus I'm pretty sure it's lost some DPS with the change to stat weights.
The benefits would be: no more useless stanceless position, one less button needed, no more accidents during stance change, not having to do many adjustments to your playstyle when playing in low level content, and no change at all in the overall class balance at level 70.