Why do you keep removing Spell Vamp?

To me, as a mid lane mage/assassin main, I love Spell Vamp as a component in items, and you keep taking it out. Why? The "15% heal on all abilities" doesn't seem much like a better option. You took the SV passive out of WOTA, now you are taking it out of Hextech Gunblade. My favorite way of building Morgana as a SV filled burst mid lane mage is now gone because the passives on the WOTA and now Hextech I do not like. Now the champions like Vladimir, Morde, and others that have SV passives can't stack it because you took it out. That's not fair. Bring it back please.