I have an important observation to make.
So, when we first discovered that the UAs used morse code, the generalized thought was that it was a game decission. After all, if FD had used a trully alien code, we could have been years trying to decode just the UA.
However, do you remember what Braben said in last E3? That he wanted the aliens to be "trully alien"?
Well, this leads me to think that the morse code used by the aliens is not a game design decission, but an story driven choice
This has a direct implication: Somehow, the aliens had interacted with the humans before. Maybe in the war, maybe somehow else, but they got our morse code and used it in the devices we have found.
What does that mean? It means that we have not been uncovering the alien secrets, but rather we have been following the clues they left for us. And this actually seems to correlate with every time an alien ship appeared. Its like it is indicating us that we are in the right way, first with our presence in the Pleiades, and then "scanning" the commanders and the alien motherships.
So, it looks like the aliens are guiding us... somewhere.
But why leaving so complex clues? Isn't there an easier way?
A very interesting observation made by cmdr Maya Fey is that it doesn't actually make sense. It is such a subtle message that looks like it was meant for the humans to find it.
What if there are humans involved?
Maybe there are humans involved in all this, using the alien ships to try to communicate with us. Maybe the thargoids and the humans became, somehow, "cultural hybrids". Maybe... there are a reign of possibilities here.
But just have something very clear in mind: Most likely we are not unfolding the alien secrets. Most likely, we are just following the clues they left us for some reason.
Whatever is at the end of the rabbit hole... is still a mistery. But be prepared, for those aliens have known about us for way longer than we do realize.