He was, but not to her. He won't be Deathwing to her for a very, very, very long time. As problematic as her thoughts are when it comes to Neltharion himself, he does raise a more valid concern.

"We will need to outfit you properly." Disguises aren't really going to work out so well, but giving them proper armor can be of some use. "I will speak to Krasus and make it happen."