So on occasion I'll bring out my dog pet on the alpha for tanking purposes to handle an elite. So far I have to say that the threat generation seems pretty good. On an 85k health elite I misdirected Dog at the beginning and did a double tap AiS + another AiS and he never even came close to losing agro. Nor did his health seem to go down much. Hopefully this stays consistent through to live as I feel in Legion the pets seemed to be lacking.