Could it just be that there are only a limited number of companies in the business of painting airfield markings; the weather has been unsettled in recent weeks [particularly in western Scotland]; there are other airfields in the queue for painting; hence the delay?? Oh and perhaps you cannot publish revised distances until the markings are in place?
That may well be the case but until its changed the TODA/LDA remains reduced. It doesnt explain how all of a sudden there is an increase in small jets and turbines which previously were supposedly unable to land due to the reduced distances.