If Junkrat isn't hurting himself from his own explosions anymore, why should anyone?
I'm not saying that sarcastically either. I always thought it was a dumb idea that you can't hurt your teammates, but you can hurt yourself. It was the first step to making D.Va viable when she could not die to her own explosions and it was a good one.
I remember one time that I died as pharah in Lijiang tower because I ulted while I was in front of one of the hanging thingies down from inside the room. It was particularly egregious to me because I killed myself because I shot Pharah's rocket barrage at pieces of cloth, and I died while they came out unscathed.
I like all the changes happening in PTR. Ana is going to always be a good hero because of heal grenade and sleep dart and nanoboost the same way Lucio's always going to be good because of speedboost. Sombra's getting better and better to use, even if her damage is still butts. Winston's barrier getting a boost is also a step in the right direction. And Zenny no longer has to worry about Zarya's barriers. Now if they can just shake up Reinhardt's shield a bit and fuck over Soldier's damage, they'll really shake up the foundations of the game.