In vanilla, one of my favorite things to do on my night elf rogue was to sneak up on people out in the open world or in cities / towns and nobody would be suspecting me. I had the element of surprise and it felt great.
With the near-universal use of the Spy addon, however, this is never the case. The moment I use stealth, enemies start mass aoeing/clumping together.
I don’t feel sneaky anymore. In fact, I feel the complete opposite - I feel as if, by using stealth, I am mass announcing my presence to all enemies in the vicinity with a loud buzzer. This is definitely against the spirit of the Rogue class, which is designed to be sneaky and subtle, not a class that yells its presence with a loud buzzer from 200 yards away every time the class uses its core ability.
Oftentimes, using my stealth ability hurts me in more ways than it helps, as it totally ruins my element of surprise, which is ironic given the intended function of the ability. It sorta kills the fun game experience that I remember back in vanilla, and it doesn’t feel authentic at all.