From doing some duels on pts with stamdk i can say this much:
Noxious breath dot is dead, it deals pathetic damage with hits on players less than 200 dmg, i think it hasn't been that bad not even when no one wanted to use it.
Venomous claw is the highest damage single target dot in the game and it's still laughably weak.

Dots in general deal not enough damage in pvp, on live they are completely overpowered, but i think the changes went a bit too far.
Values should be reworked to get a better middle ground.

Now to some other things, stone giant is bad, it really is.
The bonus effect is useless in any situation.
Having to hit someone 5 times to stun them with the same ability while the stacks disappear every 7 seconds because you will stun an enemy on cooldown is just flawed and bad.
The whole ability is bad in fact, not only for what it does but also what it was intended to do.

First of all it's ranged which means as all ranged abilities it had a minimum travel time even when used at point blank range, for a class that is in no way ment to be used at range this doesn't synergies with anything while just adding a new drawback compared to its competitors.

Then you have the damage which doesn't sets it apart from other skills which are used as spammables like dizzying swing (even with the nerf it's better than stone giant) or powerbash (which does more damage and offers a synergy for DKs who like to block)
Not only being worse on a performance level than those skills no it also fails to give stamdk any identity.

Identity isn't given by just handing out mirror skills.
Identity is strengthend when a class ability synergises with the rest of the class and other abilities in that class.

One example being suprise attack stunning from cloak.
Power lash proccing on rooted or stunned enemies for magdk which has skills like talons and fossilize to complement it.

But stone giant doesn't do anything like that, it doesn't help stamDK in a pressure playstyle neither does it open up new way to play a stamDK.


Now for the last point, why do you still change molten armaments over and over again, it's a useless ability, handing out longer durations on major brutality and sorcery doesn't help because there is not a single build out there who doesn't have an own way of having 100% uptime on it without any drawbacks. There's no reason to put the skill on your bars because there's no situation where you'd use it.
Just looking at what other competitors offer should tell you that the whole skill requires a complete rework like bound armaments got (great change there)

Might as well delete all my stam and MDks I'm so tired of this BS with you guys on destroying this class. It's a damn DRAGON KNIGHT! Not a damn salamander or a fire frog. It's supposed to have crazy dot damage.

Both new stonefist morphs are useless, at least in PVP. Tooltip is low, Idk, how from the weaker but versatile ability, which can both heal and stun in same GCD for the cost of being expensive and easily dodgeable, skill can be turned in completely useless. Why in the hell anybody wants healing of 2 random targets on slow dodgeable thingy which doesn't stun anymore, doesn't do damage, doesn't do anything other then random unreliable heal???

Stone giant morph was cheap and has some usage in ranged bow builds, after nerf of draining shot.. but now.. ok, i guess in group PVE content tank may spam this (though where tank will take resources to "spam" 3k+ STAMINA cost ability while sitting in block 75% of the time?).. but this is not a dps spammable for sure. Reduce cost to 2k and then we may talk...

Not to mention that it restores stamina, and costs stamina :B i guess that's the reason behind abnormal HUGE stamina cost but ability cost shouldn't cancel it's own passive. Make this ability cost 2250 magicka and then we'll talk. With 3.1k in medium and 3.3k in heavy this ability is like a shot in one's own head.

TL;DR - What you done to this ability is not "class identity"... this change is some kind of perverted nerf of rarely used skill to oblivion... YOU REDUCED PRACTICAL RANGE IN 3 TIMES, REMOVED STUN, INCREASED COST FOR STAM AND THIS IS CALLED NEW STAMDK CLASS IDENTITY?