It is not used once. After beating all the story and strikes and the raid I went there because I remember it in the beta and it is not used once at any point at all in the game. That is particularly strange to me, especially because it's a half decent little area and they just forgot about it, in the game where you go back through the same area over and over.
honestly that's one the most disappointing things to me. There are 4-5 tucked away areas on earth that have high lvl knights and such guarding them, but when you remember to come back at a high lvl, they were literally guarding nothing, not even a chest. One in particular is on one of those boats you can go down into a ways and there 3 hallowed guys 1 of which is a named guy that is hard to kill even at higher lvl. Almost looks like he's guarding a vault or something but again you kill him, nothing happens. oh well I guess dlc
