A Question for Riot; Does upgrading Eye of Frost STILL Remove the "lockout".

This is how its been for a while. Spellcaster-supports, like lux, avoid taking cs early, get gold from spell thiefs, etc. lockout as normal when they kill minions. however, how it currently is, ungrading to the eye of the watchers REMOVES that lockout, for late-game when they have enough power to kill minions easily by themselves.

in the new Nerfs, is this function removed? does the lockout stay, even in T3? cuz i'd vote that it shouldnt. it gives caster sup's a REASON to even bother upgrading their eye of frost. Why waste 900 gold on a bit of health and +1 ward, when i can get, say, a Feindish Codex?