I think the current squad fits the story very well. There is nothing "ordinary" about any of them. So it seems none of the existing companions were simply scooped up like the commoners in Baldur's Gate were - the PC and existing companions were scouted and "collected" by something (the Absolute? An Elder Brain? A Deity?) A "normal" companion would run counter to the narrative Larian is trying to tell. I suspect that all future companions will have similar odd conditions - indications that a power is trying to use them for something. Not so sure about whether Minsc fits into that category, but the rest, including the non-recrutiable tiefling, seem to fit into the narrative that none of the companions are normal heroes just awaiting a chance to join and fight for your goals..
That's a really nice and interesting way to look at it. and about minsc, we talked about it somewhere here, but I think the fact he doesn't fit combined with his personality have a lot of comedic potential. And I don't need much from minsc other than being comically awesome. And I really hoping the other companions will be constantly sarcastic towards him and he will constantly take them seriously.
