Everyone should be willing to give Shattenkirk a pass last season considering his injury issues. If the injury, or the poor play, continues into next season, then I'll become concerned. Also, given the Rangers lack of talent on the blueline, and their rebuilding standing, its ridiculous to bitch about his contract at this time.
Either way, the reality of the situation is Shattenkirk is the exact type of advanced metrics darling who will get eaten alive by the fanbase if he isn't scoring 60 points from the back end. Whether that's fair or not, it'd go a long way if he added some tenacity to his game when he doesn't have the puck.