I expect more of the network airlines to do the same. Now that fuel is an issue, and other economics of the airline industry are pretty difficult, a lot of marginal flights are hard to justify. It's a prudent trimming of marginal routes.
Overall, I think they'll be OK, given that the economy is improving and fuel prices are starting to moderate. But nobody knows which way fuel will go, and to base your long-range planning on an optimistic view of oil prices, I think, is very risky.