For Mount Vernon issue, I totally agreed with Winterkjm, there are some weakness to inscribe Mount Vernon as a WHS, in such the time when the rumour of 1000 sites limitation is spreading around. Mount Vernon is really lack of uniqueness; however deeply important for American history. In my opinion, eventhough ICOMOS defer or refer the site, WHC may think another way to compromise, but if Papahānaumokuākea is incribed, then we may see the referral of Mount Vernon at least to save face of Americans which better than NO or Deferral.
However for Albi of France, I think it have a chance, there are no representative of Lanquedoc style which is quite unique in the region and these is quite a nice site compared to other rejected cultural sites of France in recent years, but thinking again of too much european cities in the list together with Regensburg example, ICOMOS may just refer, giving French a room for lobbying, but after read a french newspaper on good report of IUCN on Reunion nomination, Albi may have to wait?!
Also for Hanoi Thang Long, it would be great to inscribe the site in the year Vietnamese celebrates Hanoi's millennium. Notice that the change of name of nomination dossier to limit the site only to central sector of imperial citadel which is just recently discovered by archaeologists, really make me wonder the worthiness on this site to be inscribed, as currently the site is limited to the public and no well openly research to the public. I'm quite prefer the old version of nomination paper which is included many historic sites in Hanoi which clearly show its significant like the Temple of Literature. Anyway better to look the final result from Brazil