Thanks to the new report system some reported people are getting banned, and you will get a notice when one of your reports has resulted in a ban. But I feel like this is just a tiny band-aid on a severed limb. People buy smurfs, so in a sense, Blizzard is actually capitalising on the toxicity.
What's more is that I feel they now do all their balancing to suture the pro players.
My favourite is Sombra, which got a nice buff a while back. But the pros complained about her being OP instead of learning how to play around her so she got a nerf merely two weeks after.
I'm guessing she was too big a threat to Tracer and Blizz don't wan't to set their posterchild in a bad light.