Well Jurcina has clearly earned more playing time as Slegr is healthy right now but has been a healthy scratch. Hopefully Isbister can return soon but that ankle injury looked serious, so if Isbister doesn't return they can move Green up to the 3rd line and put LaCouture or someone on the 4th line. But my main point is that you can't trade Razor until Hannu comes back.
As far as your other question, it'll be tough. I don't expect Thomas to continue playing this superb but I think the last 2 months of the season will be a fight for not only a playoff spot but for the number 1 goalie job. I don't expect the decision to be made as soon as Toivonen comes back.