I could probably be alright with one of Legwand or Alfie back, but not both. I don't really see why Legwand would be necessary with Weiss healthy and a bunch of centers already on the roster. Alfie was not good after the Olympics, though injuries probably played a major role.
First order of business has to be fixing the defense.
There was a period of time after the Olympics where Alfie wasn't as good, but neither was Kronwall. They both had long Olympic runs while everyone else had rest, and then were expected to come back and be leaders on a team that was more battered than ever. I give him a pass for that because he did get it going again down the stretch. And next year, there's no Olympics and you'd have to hope we'll be healthier and can give Alfie a role that he can thrive in more.