Priest: replace “void-weaver” with “heretic” and make it all sorts of blasphemous and “anti-holy” traits. Blood Magics and shadow magicks
DH: replace fel-scarred with “fel-lord” and build the tree around embracing your inner demon
Warrior: replace slayer with blade master.
Mage: replace sun fury with “Sunstrider”
Paladin: replace “light smith” with “inquisitor” lean into a darker and more “might makes right” paladin theme to oppose the Templar.
Monk: replace “shadow pan” with conduit of the elements. Lots of wind and lightning abilities. Replace “Master of Harmony” with “Conduit of Harmony” so all 3 hero specs are “conduits.”
Warlock: replace diabolist with “Portal Master” and lean into the portal keeper fight from legion. You summon various types of portals (fire, shadow, fel, etc…) for different circumstances. Fel = fewer demons but BIGGER, while shadow = a ton of smaller demons etc…