I really hope y'all fix this quickly. Since this is a progression quest required to experience the "New Expansion", its a bit silly that this isn't #1 on the known issues list.
Well, I guess it's both, I don't see the icon for Heroic moment so I therefore do not see the abilities that trigger when you hit HM. Sorry for the confusion.
May have missed this in the patch notes, but did they remove the Heroic Legacy Abilities? I went to use them and it wasn't on my bar. Looked in abilities and Legacy, and didn't see the option for it.