I know people are down on Labanc, and for good reason, but you have to take a lot of factors into account when deciding on a buyout, and I don't think he fits the bill.
Is there potential for Labanc to rebound? First you look at his age: 26. This year was a lost year. Was he atrocious last year? I wouldn't say he was good, but he wasn't a complete lost cause. His salary isn't a giant albatross. He needs to step it up, and be utilized better (both at even strength and especially the power play, where he has the potential to be something of a power play specialist), but there's reason to believe he could still be a decent contributor, if not worth his whole salary. And he only has two years left on that deal.
Compare him to Martin Jones. There's a case where the buyout made sense. Compare him to Marc-Edouard Vlasic. There's another buyout that makes sense, particularly if the front office is going to attempt to build a better team. Take Vlasic's age, take his extended trajectory, take his potential for rebounding (basically zero at this point), take the contract length and salary. Big, big difference compared to Labanc, if you ask me.