Quick update:

Did T7 again tonight. If I try to get initial aggro on a Deathdancer using a melee range attack, like a combo'ed Skull Sunder or Steel Cyclone, it will just run away from me, go to someone, look at them, and come back.

If I use Tomahawk, it will start running to someone, BUT THEN, it actually comes back to me as soon as the attack connects... Sometimes it takes 2 if there's a bit too much healing aggro at that moment. But Tomahawk seems to fix this issue for T7.