It was never designed or marketed to be an MMO. MMO's by definition cannot have the same amount of content, reactivity and user-driven change that a single-player game can - for example, you can't have a player murder all the quest NPC's for a laugh, screwing over all the regular players.
(Also, MMO's are terrible, grindy, and ultimately boring.)
Yes, yes they are, most MMORPGs out there are not even worthy of the "RPG" segment of that title for they lack in the features of that this game provides, it is games such as this and the single player Elder Scrolls that I'm sure a lot of people of whom enjoy roleplaying can reap a great experience from however what I imagine is not a "terrible, grindy and ultimately boring." but a server set within this game in a world of that can support the adverage sized Roleplaying community where as once the content had been cleared there would be the roleplaying within the land with other players to enjoy.
If there is anyone out there of whom had purchased the early beta of Divinity: Original Sin via steam, could you answer me the question of if the Co-op on steam utilises Steam servers?