He may have other reasons (like health or family) that we may not know about. Traveling can be very hard on people, esp. people as old as him. And I'm not sure if he flies coach/economy or business, but that would also make a difference. (flying coach international can be brutal...not that business is that fabulous, depending on what airline you fly with)This, but I don't envy her the decision. From what I get from the article he is willing to keep coaching her full time, but not willing to travel. Under those circumstances I'd probably stick with him if I were her.
I am actually surprised he's not going to stick out the Oly year. I feel him about travel stinking but he always seems to have so much spirit I'd have thought he's want to be in Sochi.