They have (both, I believe) recently come up for sale, and appear to have been sold to new residents rather than sold for demolition.
The new residents will probably complain about the noise. Unless someone else has bought them!
As far as the displaced threshold is concerned I had always assumed that it was the road which required this and that when the road could be temporarily closed (as is now the case) that this would have resulted in the threshold being moved S/W somewhat. I was surprised when this did not happen so assumed that it must be the church which is the limiting factor.
I don't suppose you remember the declared distances prior to the RESA works? Like you say, seems a tad strange after they moved the ILS and flattened the ground to produce the RESA.