Next Major Update and Potential Lethality Concern with Sanguine Blade

With the next patch or major update that will introduce the new arena and items, my main concern remains solely with Sanguine Blade, a new lethality item soon coming to the game. While lethality is already strong as it is, my concern is that Sanguine Blade will make assassin characters and any other types that rely on lethality far too strong. I was in a game with a Zed that built the so far three known Lethality items; Edge of Night, Duskblade, and Ghostblade, and it was annihilating people.

My question built upon this concern is will the other lethality items see nerfs coming their way or will assassin characters like Zed or Talon be nerfed?

I'm asking this because this could potentially make them completely game breaking.