Without Chytil, we don't have a 3rd line center. We'd end up spending whatever we are saving, and perhaps more, to replace him. If healthy, Chytil is likely better than whomever we would replace him with.
It's in our best interest to keep Chytil for at least 1 more year. If he gets hurt again, we have LTIR to work with. If he isn't effective, we can still buy him out next year at 1/3rd. But if he stays healthy and returns to form, he can help us win or be a trade chip to get someone who can help us win.
We're more likely to need that cap space next summer than this summer, so we're better off waiting to buy him out, if that's the route we end up going.