User blog comment:Berryeater/League of Rework, Part 2, attributes/@comment-7481207-20160525203258

"spell vamp was removed due what riot states before it got nerfed that it was unhealthy. This also applies to life steal"

Wrong. Did you read exactly WHY spell vamp is considered unhealthy? It was removed from the game because of its large inconsistency. On some champions, it was broken, on many others, worthless. Life steal doesn't have this problem, as it affects every champion in (mostly) the same way.