Sustain champions are unable to deal with current mage builds (Morellonomicon)

Ever since Riot decided to nerf , which made it no longer gold efficient when compared to , almost every mage taken Morellos as their go-to mana regeneration item. The problem resides in the fact that Morellonomicon is a hard counter item to champions that rely on sustain to survive in teamfights and there may be a couple that I did not mention.

Under normal circumstances this would not be a problem, but with Morellonomicon being picked up as a primary CDR/mana regen/AP tool, the grevious wounds passive has made it almost impossible to play a health sustain champion effectively.

The passive needs to be removed from this item and put on an item that tasks the buyer to make meaningful sacrifices in its purchase. Otherwise you take an entire class of champions and handicap them for the simple reason of wanting an incredible item with AP/mana regen/CDR.

What are your thoughts?

EDIT: I just want to be clear that this is not a "buff Athenes post." I am concerned about Morellonomicon's passive making it too risky to pick certain champions because they rely on sustain. Grievous Wounds just cannot be on a common core item for the sake of champion balance, especially when sustain tank and mage exist in the form of more than 4 or 5 champions.