I would definitely rather be stuck in US for 3 days instead of somewhere like Lithuania where they don't speak English.
There are many ways in which LS can operate the routes.
Due to their growing 752 a/c, they would be able to supplement the 752 on tech to fly the route, and bring in one of the charter Channel Express a/c that are sat waiting for charters.
The only problem I think that LS have is offering Upper Economy seats, which is not part of the current service. The Upper Economy seats make the airlines such as flyzoom and flyglobespan (they also offer business class) the most money from a flight.