Sanguine Blade still overpowered

Sanguine Blade's 1v1 potential not only makes it extremely gold efficient, but ultimately ruins the game. When you have champ losing a lane all game, then all a sudden start dominating the game like it is nothing right after buy such item is ridiculous. Having the 15% life steal and the 100% increased attack speed basically means that champion is un-killable. Sanguine Blade needs to be nerfed to all hell or just be removed. P.S. Riot test items before you add them and take feedback serious, your game is suppose to be fun for new people not make them regret playing such a game.