ESO has a lot of things I really like to see in WoW, like color or VFX changing abilities in your classes.
WoW only release green fire for one class only and try with Glyphs yet they have not updated system in some time.
Now that they are updating the Classes not just visually but also with the Hero specs I can totally see them as a way to introduce a pseudo subclasses…
I think WoW even try this in MoP when warlocks could off-tank with Demonology, heal with Affliction and I remember other classes could do similar things like that too… Many of the Proving Grounds challenges became unable to be completed by the next expansion where they rollback to the old roles again.
I see no problem for WoW to use the new Hero Specs to re-add this pseudo subclasses again where in MoP they literally added them directly.
Not going to lie, I’ll be returning to my Vampire Necromancer to try these combinations, I have a few builts in mind I want to test with Arcanist skill lines, while we wait on WoW down time.