Would Ghostwrithe and The Everlasting Gaze work well now in poe2?

Ghostwrithe
In poe1, if u equip Ghostwrithe and allocate CI, u may get no energy shield, but in poe2, Ghostwrithe adds much ES.

The Everlasting Gaze
The description is "Gain (20–30)% of Maximum Mana as Extra Maximum Energy Shield".
Extra in poe1 means it could not be scaled by inc/dec ES mod. But in poe2 it adds the base ES.

Would it be a mechanism or bug, I just wanna try the ES BD.