Seems like the more people that don't want Shattenkirk are keen to bring in another Lovejoy.
You don't want a player that makes any risky plays, tries to create offense, or make the odd defensive gaff?
You may as well bring in Lovejoy 2.0, to chip it off the glass every breakout, and be swimming on his belly most of the night trying to block the shot he just created for the opposition. The way the NHL is now, is that you want to spend less time on your own zone, or, not get there in the first place.
I agree that there is a point you have to say no. ie $7.5m+. But the more players like Shattenkirk you have on the team, means less time in your own zone, getting the puck up to Hall and co. Shattenkirk is far from the perfect Dman and he is no Hedman, Josi etc. But you try and find bargain bin Dmen of his ilk and you are bringing in another John Moore.
Then you can leave Lovejoy on the bench until a PK is needed.