If you would check out FB and discrod, you would see some new stuff for Pontus. Although they will never have high tier elite units, they are more jack of all trades faction. None of their regiments really did well outside of Sarmatian bodyguard. Their strength was always in numbers and variety of troops types. One of new units they get is late reform upgrade of thureos swords, that was raised at the end of Mithridatic wars, using partially Greek, Romand and Armenian equipment and draw from 3rd pop class. Their cavalry will also be a bit stronger and maybe they might get some Bosphoran friends to join
Here is example of their cavalry updated look that will go along some stat changes.