I noticed the signs out at the weekend. The diversion is a separate journey on it's own !!
I wouldn't like to be the person to tell someone they have just missed out on the road being open and this is their diversion. A job for the Police I think.
Also emphasises the fact how vital the road link is to the area. Even though we are part of mainland UK, it is still a remote area we live in. I am often told this when placing orders, only to find out delivery charges are trebled, classed as Highlands and Islands
Will trunk road status ever extend passed Kennacraig

Not that the road deteriorates, if anything I find it safer and more pleasant to drive on. It's the cost of maintenance and improvements which changes, not funded out of local council budget. Could free up money for other roads and pothole repair (which have got better)