You also can't ignore the fact that Turris broke his foot twice last year. An injury as severe as a broken foot.. and then a RE-broken foot.. will hamper anyone's production. These players are human.
I understand the concern, and I'm not trying to speak for your team or fans. Turris, to me, just seems like a viable candidate in that he can fill in at 2C for now, and then flip to 3C when Patrick is ready for a bigger role in a few years. Would you be able to do that, for example, with a guy like Duchene?