I remember reading that they were pretty happy with Spence before the injury, so much so that they expected him to contribute immediately. I could be wrong on that but I swear I remember reading it. However you are correct. A LOT of variables involved with Spence AND it can't hurt to add a guy like maualuga. If they could do it, it could be a Farrior like signing.
True but Spence's injury will probably cost him a potentially great career. I doubt he can get all the way back in 2013.