Cryomancer
Arcane
Hold one button and a meteor kills everything?
That is not the case of Dragon's Dogma. Meteor has a very long casting time, has a hard time hitting enemies in certain "scenarios", can easily be interrupted, is worthless against enemies which require a very specific small weakspot to be defeated and so on. Of course, using a high level magic against weak enemies will kill them easily.
Versus something that resembles a big RPG world, filled with quests and a lot going on?
ESO has very basic RPG elements. Sure, has a lot of quests, but nothing that you do has any consequence. The main quest doesn't make sense for an mmo. Almost every single one that you see in the game is a freaking daedra lord slayer. WoW WotLK did it right, you are not the "lich king slayer", very few players can be one one of the soldiers which defeated him.
--------------------------------------------------
As for the new arcanist class, will be a homogenized class which plays almost like every other single class. I miss games like P99 where Wizards and Magicians despite both being arcane casters plays completely different.