From IGA interview on IGN:
The main thing I really focused on in regards to how I wanted this version to play, was the feeling of it taking time and causing tension to grab these new skills away from enemies, sometimes in the heat of battle. Instead of just killing enemies, grabbing their weapons, and using the items right away, I wanted that feeling you get when you're actively pulling away the magic and taking time to absorb the new powers. So that certainly ties into the whole design on my end.
It almost sounds as if IGA's reviving Curse of Darkness' "wait-for-purple-then-pull" rare item drop mechanic. And this emphasis he's making about "pulling" the power away and the feel of tension "in the heat of battle". Then again, maybe it's more like
Odin Spehere, and you just have to hold a button down to absorb the glyph that floats out.
The fact that he keeps talking about tension tells me it's not going to be as simple as holding up, but that you have to do it at the right time, (like COD).
Interesting anyway. He keeps talking about this in various interviews.