As the comments on the site on TMA already said, it has been flattened somewhat. It is almost without interpretation (but I think that can be over-rated with these sites since we know so little about them). I'm no authority on the management. I assume that all those trees must have messed up the possibilities for archaeology somewhat (but then archaeology is so destructive!!!!). It seems well managed to me. Held with a light hand - not too many "do not" signs and it is locally popular and well visited. (and is part of the core business of NT, unlike John Lennon's old home!!!!!)