Embowel is easy to fix. Give it more base damage, and have it inflict stun for 4 seconds when it lands (guaranteed, not like helm or seism chance to stun).
Still only makes it worth 1 point (over none now), but it feels in line with the capabilities of certain other R3’s and fits into the rest of barb’s skills with all the focus on stuns.
Oh, and make it cast like…10 times faster, that too LOL.
Cleave and Helm Chopper are completely fine as is. If they get attributes besides Enhance, that’s honestly a bit overkill. Cleave’s extra damage on stuns stays relevant, as does it’s slash%+ debuff. Helm Chopper is forever bread and butter stunning.
Giant Swing needs to first of all get fixed. Character doesnt even spin around properly now, just stands there locked in the animation and the enemy takes the damage randomly some time later.
Other than that, have it grab the enemy and throw it in one fell swing that can be targetted AFTER grabbing the enemy. Like, first, it auto-grabs the closest grabbable target to you within a limited range, then you get the targetting reticle to aim around for a max of 3 seconds, during which the grabbed enemy cant do anything.
At that point it’s basically become a Spear Throw/Shield Lob but with an enemy, and keeps the same disruptive element as it has now (even better, since the enemy is locked in one place rather than spinning around) for team members to utilize.
It’s actually fine damage wise. Just too much spinning, and no control over where you throw, are the things holding it back.
Stomping Kick just needs to drop the god awful rebound/auto-jump. Nothing more. It’s a fine skill when you force a cancelled auto-jump by jumping out of another skill, but that’s limited to a handful of skills (Umbo Blow is the best option)
Alright, those were my two cents. Barb is in a good spot, just a few things need to be changed to make the remaining 3 trash skills good enough to use. No need to go all out on adding attributes or random extra effects.