I haven’t read the rest of this thread but here’s what I know
The biggest thing is her swing YOU NEED TO REMEMBER that you control where she is goin ot land, either she swings for a full 2.7 seconds and let’s go or she pulls into melee range of you.
There is a third option to pull away form the swing with grappling hook but the thing is tht leaves her with no mobility for a little under 10 seconds.
NOw if you’ve see nthe Qhira centeric WTF moments you’ll know there are some crazy goofy things you can do to get her on the other side of walls but that’s an exageration of the real counter, all you have to do is take a few seconds to position yourself right against your tank or someone with a decent stun (dosen’t even need to be a big 2 second stun, I’ve accomplished this with a Butch stun.
Suddenly she’s in the middle of a team with no tank to peel without going through your tanks
If you’re fighting her with a 5 assassin team and no CC i’m sorry but you got played by the QM Matchmaker in the same way you would if you were fighting a butch that gets fed.
Edit: You mentioned you play healers with range on their side, I don’t know much but I think it’s worth noting that Anduin’s root can also achieve what I’m talking about about leading her into CC
Move left, right, up, and down. Shutter stepping with basic attacks and abilities. Leave combat around the time you fall well below 50% hp (depending on her talents which you can view at any time). Also don’t chase…
If she engages with her trait, Ana can sleep her.
Ana can also negate her heal in tfs with her grenade, keep it when she’s low hp.
Nova can block her trait and E with her decoys.
Ming can teleport with her into her team, or keep it to use it as an escape. If you pick Aither Walker at lvl 1, you can dodge Qhira’s openers with Teleport.
But ranged Heroes shouldn’t have that much problems against her, because they can poke and kite her and in tfs, usually they won’t be her target thanks to her melee nature.
I don’t know on what lvl you play, but most Qhiras will probably be overaggressive, so you can bait their E (the circling) near your towers/gates and take her “home”, so she does from structure shots.
And you can poke her on the lane, because she has zero selfsustain (heals) without her W dot on Heroes.