No, don't panic. The exciting aircraft are just u/s because the groundcrew are all painting the hangar floor.
Oh, and the idea behind the Lims is just to give the 3 aircraft a better chance of seeing out the planned out of service date. If you carried on flying them on Tac training and so on, they would have to be withdrawn earlier than planned. Getting a bit old, you see.
As for using Mk 5 wings, umm...no. I don't know where to start with what's wrong with that idea.