Last I heard was Mike saying in 2009 it was still "on the drawing board".
For me, one maybe but a whole load of them no. As a compromise, one every 2 generations maybe, in step with improving technology. It's like saying lets open EKLB, we could only do that once and we'd be sure to destroy evidence that the future might have found. You wouldn't want that on your CV would you - posterity might dub you Stonekiller Roy!
(On the other hand, hurrah for Keiller who destoyed evidence but gave everyone huge pleasure)
The re-erecting of the stones at Avebury is a no brainer. The stone sockets are easily found these days and it would be the easiest of jobs to complete. Its a nonsense for them to suggest that digging them up would result in their demise by nature. Those sarcens were probably originally buried anyway and are still here after many thousands of years.It all comes down to money as usual and excuses not for doing it IMO.
Stone circles were meant to be 'used' and be seen, not fallen, lost and uncared for.