So as it is now standard in many other games, Blizzard should add a new option to turn off at least friendly offensive spell effects.
The game would become way more transparent and a lot less laggy. My recent experience from VOTI with millions of AoE spells and effects everywhere is just bad. Fire rains, blizzards or ground aoe everywhere really obscures enemy boss AoE effects. Talking about and dying to FPS drops because of huge loads of AoE effects is obvious to everyone. I dont have to elaborate on this topic more.
So Blizzard devs, it is really time to implement this feature. Many other games have it, and believe me, it is a great QoL improvement change.