Killjoy has passive information aswell, her alarmbot is literally invisible until you hit it, and her tourret just watches a lane and spots players in line of sight. I don't know where did you get your logic but it seems like you just said a bunch of things like it made sense. Chamber trip is not that different from Kj's tourret or Cypher wires, and Viper Harbor worked insanely good because it's just too versatile, it can be played agressively, for example using Harbor cascades to flood into the site while defending, or you can play it insanely passive where you slice the map in ways where you give the enemy control over areas that are beneficial for them, but you playing behind the wall makes it very uncomfortable for them to do anything. A very obvious example is how Loud cut off themselves on Icebox on B, while defending. They put the Harbor wall as if it was a Viper attacking wall, giving you the plant and control of the front site, but they are all waiting behind it to spam and retake while you enjoy the small space they just gave to you. They did the exact same on Haven, walling themselves off on C giving you the plant, and the same with the Viper orb on A, giving you the free entry from long. And probably other maps, but I didn't watch all their games
TLDR: Viper nerf won't do anything to Chamber, and Harbor doesn't need a "aggresive comp" to work