Okay, so this Black Armory is a big secret right and before I get into this, I really liked the idea of this "expansion." Anyways, I just hopped on to check things out before my 2:20 class, and I was surprised to find that the Spider is an ally of Ada which is cool. What isn't cool and what doesn't make sense is the location of the Armory itself. Now I know it is hella convenient being in tower but it does not make sense. Let me explain.
First off, in the Vidoc, it is stated that the armory is a big secret kept sence the golden age. (correct me if I'm wrong). How can this be a secret for so long if the wall that the armory calls home was built well after the collapse? We literally saw a clip of Zavala and Ikora building the wall around the city. If this Armory is a secret they would have to know about it in order to build the wall. Thats the first problem with it's location.
The second is its proximity to the current tower and the door of the Armory itself. Suppose that they had no idea what the armory was or that they were oblivious during the creation of the wall, how in the hell do they not question the influx of supplies going to this location that is not even trying to be hidden other than a really suspicious door that GLOWS. On top of that, Ikora seems to be oblivious to the guardians walking out of a previously closed off door way with the most advanced weapons we've seen to date. Wouldn't you think they would get suspicious of this super secret weapon smiths that are literally neighbors to the vanguard itself taking in supplies and doing business with the Spider? How do they contact each other in secret? Did they also meet in secret? I'm at a loss for words, they all fell into the plot hole the writers made that's big enough to drive a bus through sideways.
TL;DR
The location of Black Armory makes no sense in terms of lore.
If anyone can come up with a good lore friendly explanation that mitigates all of my points (or any really) I would love to read them because I just don't get the logic here.
Edit: So another thing that I noticed about the armory is the three family banners outside the armory itself. These families make up the Black Armory itself and yet they are just out in the open for anyone to see. (Not sure if they are there before you actually gain access to the armory though, if that’s the case then disregard this edit lol).