So I asked this question about the third sub-class slot in Destiny a while ago (when Destiny was still cool new). At the time, it was uncertain what it was for/if it was going to be used/if it was an oversight.
However now, they have announced a third sub-class for each of the new classes (which I took the liberty of adding).
So, the question is which one is correct? Or more specifically, which one should I accept as the answer? Or is that purely up to me?