I used to be excited for the possible implementation of non-PHB subclasses, in particular Hexblade had me theorycrafting possible multiclass synergies. As EA progressed the interest in D&D 5e has vanished as it became obvious strategizing ways to exploit Larian's excessive and unbalanced magic items is a lot more impactful.
How to maximize the effectiveness of items such as the Circlet of Flame/Helmet of Grit will be much more gameplay defining than any subclass/ability focus. Sadly.