What place you want to have free access in the game?

[Enkidoh]

I belive it's pretty much the exact same as Arrzaneth Ossuary (Thaumaturge guild), or at least used to in the original FFXIV

Right, it's pretty much just a copy of the Ossuary, only the statue inside is slightly different, which is probably the reason for it's no-show, SE seemed to be keen on eliminating 'double ups' of areas when initially designing ARR zones that 1.0 tended to suffer from - areas that were basically repeated constantly with just different names (like Mun-tuy Cellars being virtually the same visual wise as Tam-Tara or Toto-Rak, or Nanawa Mines being identical to Copperbell Mines). Because the Ossuary was specifically the THM's Guild, it was the side of the Order of Nald'thal chosen to be included in ARR, with the 'superflorous' Sacrarium "permenantly closed" for repairs.

Having said that, Earlig's Burial Chamber was eventually opened in a patch for some reason so maybe there is still hope one day the Sacrarium will also be restored too.

My own personal wishes for open access in the game would be Ala Mhigo proper (maybe call the dungeon 'Occupied Ala Mhigo' or something to differentiate it from the open city) - the Ala Mhigan Quarter in the Lochs isn't enough.

And although it's probably what we will be doing next in ShB, but more of Emet's reconstruction of Amaurot being opened up will be very pleasing - I know there is a new dungeon set there coming in 5.2 (the civillian residential area I believe?) but more of the 'open city' section where the background is as an extension of the Tempest zone would also be great. Especially that big castle like tower in the background behind the Capitol building, what is that for? It was never explained at all and as I'm so curious to find out more about Amaurotine civilization this would be great to visit.