Deiser

Maybe the "in-game commentary" could be in the form of a gag dub? Certain areas having the voice/text replaced by that of the developers, who act "in-character" but completely break the fourth wall, kind of like Seraphic Gate in Tri-Ace games.

If there's one thing that Paradox is really good at, it's that they're great at making a game accessible to a large number of potential buyers/players. I don't play strategy games often, and thus don't play the ones that Paradox frequently publish, but even then I've still heard of several of those games. If Paradox can make their games known to people outside of their target audience (such as me), I know they'll do a great job in getting Pillars of Eternity's name out there more than it already is. I think Obsidian made a great choice.