This would probably be better off in the private hero gameplay section of the forums.
Either way, I do have my own thoughts. I feel like Haze's ultimate is strong, but it is an ultimate that puts her at a severe disadvantage if positioned incorrectly. However, if a Haze is building into her ult by purchasing phantom strike or other mobility items, then their ult should be strong by extension. Same with a Haze building into fixation with ricochet. If you are being decimated by a hyper-mobile ulting Haze with warp stone or phantom strike, buy metal skin and get out of range or behind cover.
It's the same case as maybe Dynamo ult for example. He can pop unstoppable, use warp stone and ult an entire team. Should he be nerfed for building into his ult by sacrificing his networth for his ult rather than his stomp? I do not think so.