I've played World of Warcraft for about 8 years. DAI is nothing like an MMO. There is a plot with choices to make, character development, and all of the things you expect from a Bioware game. Most of all, what it does not have are other people, which is a necessity in the second M of MMO.
Having some fetch quest does not an MMO make. Most games have fetch quests. Even DAO had fetch quests. The primary task in Ostagar is a fetch quest, there are a few in Lothering, and several more throughout the game. Let's not pretend that DA2 was loaded with pointless fetch quests that added nothing while every quest in DAO was deep and tied to the story in some meaningful way. Yes, collecting venom sacks from spiders to help a farmer make some poisonous traps really enriched the world. What harmed DA2 in this regard were those items you find in the world that automatically put a quest in your log and Hawke somehow magically knew to whom it belonged. That was absurd. DAO had window dressing for its fetch quests whereas DA2 did not.