If we can already mix and match class skill lines, why do we still need the original class system at all?
Right now the only thing tying a character to their class is that you must keep one of the original class skill lines, meaning the “class” still acts as a base identity.
But if the direction of the game is increasing build freedom, I wonder whether it might eventually make sense to go even further.
What if ESO moved to a fully open skill-line system, where players simply choose three class skill lines regardless of starting class?
In other words, rather than being a Dragonknight, a Sorcerer, an Arcanist, etc., your character would simply be defined by the combination of skill lines you chose. Subclassing already moves ESO in that direction, so you might as well go all the way and give players complete freedom in their builds. After all, there's nothing more Elder Scrolls than that.