You are so demanding when its bedtime !!!!
I am on my own on this one I know, but as there has never seen a constructive reasoned argument for restoration of buried stones and there is no plan of what Avebury looks like for a century of prehistory let alone 2,000 years, & with Stonehenge obviously left by the builders in a state of flux there is more to suggest Avebury was also up and down and all around than in some tidy all up fashion that cuts right across and hides other histories and stories this landscape has to tell and represent that are the natural time ordered histories and not a reversal; the ever changing whims and self-indulgent fantasies of the present are no reason to make more of a cock-up of the restoration of the Avebury landscape than has been managed by Maude Cunnington and Keiller and Piggott. So much should be put right before anything else is considered - in my (single I know) opinion.
The other aguments you already know - you can't dig it as you have to leave it for furture generations who have different techniques, ideas, values, etc., than the present.
More in the morning....Zzzzz...
VBB