Wouldnt it be even better to have both tho?
I mean ...
Its not against anything, right?
From a practical perspective, I hear what you are saying and generally more choices is a good thing.
In this case, I think it may actually have been a choice they made with new players in mind.
If I pick one of 4 subclasses when I create a character and then all of the sudden the game changes me into a different subclass that I specifically saw in the character creator and chose not to pick, that could feel like a bug or the game forcing me into a class I specifically didn't choose.
If I pick from one of three subclasses and something happens in the game that turns me into a completely new fourth subclass, that is a mystery that can feel like a cool secret.
