The one way this would not be cost cutting is if they only close this for like 6 months to do the changeover, then use walls and such to get it opened back up with the exits. But, I'm not sure that is in any way feasible with where the exit is, especially if the muppets store needs demo. So I guess there is an extremely slight possibility it's not a cost savings measure and they are just trying to get it back open as soon as possible. But considering the total lack of details on the show, the placement of the building, and how WDW generally operates, I'd be SHOCKED if it's not.