Vigor still debuffs melee attack for characters with Unyielding Assault in the beta hotfix 6.0.2. Tooltip isn't changed to reflect that it doesn't actually work on vigor (the melee attack debuff that matters most.)

Technically, this is the beta. But a beta should be a pre-release. If it's not fixed in the beta, there's a good chance this isn't getting fixed.

Maybe CA will blow me away with a hotfix 6.0.3 after the holiday, but I sort of doubt it.