I wonder if he wasn't maybe referring to Cullen's mental/emotional armor.
That would make sense. But I kind of find it hard to believe that Bioware's joke had something so deep behind it 
Oh btw, not everything is so bad with companions showing concern! I was taking a party through the temple in Forbidden Oasis, and when my char opened the tombstone and some freaky lights entered into her, Cole suddenly asked "Did it hurt?" I was like: "
, you actually care?!" And then I was: Wait a minute, for someone who can directly sense people's pain that was an awfully strange question..
It's amazing how in trying to do something right the game did something wrong! 
It would be difficult, yes, but I think it would add a lot to these games if we had more RP options and to define and express our character's thoughts and emotions. The options we get are usually very shallow. And if we could roleplay a little better, we could actually have mutually curious/supportive conversations with the companions. So much happens to our characters, it's baffling that we can almost never actually react to any of it on a personal level.
Definitely agreed. Maybe we'll get there one day, as there are I think many people who'd love more developed roleplaying with party. I know some who don't, but they typically don't play games like DA:I, thinking that such games are moving in the "Sims" direction. I see nothing wrong with that. As the gaming industry develops, it's only natural that characters become more developed in games that heavily rely on them to draw people in. And there are plenty RPGs with underdeveloped characters or without a party to satisfy those who dislike that.
I'm trying to remember if there are games with characters who show concern back at the main char. Ok, here's one example of a dialogue that creates connection between characters that I really like. The Japanese really know how to do that. Although the game has more dialogue where characters chatter about themselves, there are some shining moments like this:
Oh, what I wouldn't give for such a moment with Cassandra! Or Cole. They don't even show or tell what exactly your own char is saying, but that doesn't even matter. The feeling of being the focus of attention is there. They're already good friends at that point, and I remember being surprised about this scene, it felt so meaningful, if a little bit ominous.
.
If memory serves, Patrick Weekes added the spirit path after changing his mind about humanity as the sole "win condition".
I'd be delighted to hear his reasoning. Well, a girl can dream 
Like ending the spirit-path resolution with Varric being such a downer and us not even being able to challenge the attitude that Cole is somehow less than a person.
Yep I remember wanting to smack Varric at that moment or pull his ears, that was just mean of him to say!
I don't really understand Varric's reasoning, he sort of believes that a spirit is less conscious or self-aware. But I really couldn't see much difference in Cole's behavior, just more "mind-reading power" and a little bit of euphoria about the change.