There are two ways to play this gameThere is a lot of things that can be tied up by a simple chained story mission/campaign and it even does not require a separate universe/instance. And I am very confused about why it wasn't done. Such a waste of content.
1) Demand that the game tell you everything. Post on the forums about how the game should be changed. This sometimes works, fdev do listen, but it will probably take years
2) Go play the game, keep your eyes open, if you see something interesting google to see if it is known - and if not ask about it.
One of these sets of players is (reasonably) happy, though they still want more. The other seems to spend a lot of time shouting about the same things. Your choice