Assuming that Dragon's Aery HNM competition was the main reason for not allowing it before, when the HNM changes are implemented please add The Sanctuary of Zi'Tah to the list of valid Nexus Cape zones.
Aery and The Boyhada tree are dungeon zones, thats why you cant cape to them. As for sanctuary its a bit surprising its left out, and I wasnt actually aware of that. The OP warp is still the best way to get out there.