Two of the same class buff missing?

[kirottu]

Early on during the kickstarter some developer talked about how having two of the same class would give you a buff of some sort. Like if you're playing a wizard you would get a buff when Aloth is in the party. This was because people usually just didn't party with same class NPCs so they wanted to change that. I liked the idea, because that's what I usually did, and it makes sense. People from the same class would work better together since they know their class.

 

But I can't seem to find the buff anywhere in the character panel.