it has such a bad tracking now that hitting opponents with the second swing is apparently sth we can dream of. Locking in while doing the attacks wouldn't help at all. On release I think the attack was doing just fine in terms of tracking but now I find myself so often running past an opponent swinging air. Even if I somehow manage to get rather close to an opponent with the second swing it simply won't register as a hit.
Furthermore it is really useless in dominion to clear minions due to it being to stiff to manually direct it well AND it only takes out about 3 minions at max no matter how well you position yourself. For that it simply takes too much time and stamina. I mostly rely on the whirl coming from using just heavy swings since the zone attack costs also a lot of stamina and is quite hard to get into intended directions as well.
Here is a short clip showing the second hit would go right through a target without registering a hit: https://youtu.be/J5cRJpvE43Y