I've been looking a long time for an MMO that has coop group content from level 1, but I haven't been able to find one.
It seems every MMO these days follows this formula:
Solo quest grinding from level 1 to max, with intermittent dungeons that only reward you for doing them once.
Then, at max level the game finally becomes about challenging coop group content.
Games in this category include: WoW, Rift, Wildstar, TERA, LotRO, GW2 (even though it promised otherwise), basically every MMO I've played in the past 7 years.
I think the issue is that if you cater to solo players by making solo questing the most efficient method of leveling up, then MMO players, being optimizers, will only use that method of leveling up. The only way to have a true coop MMO is to make group play more efficient than solo play, like FFXI did (although it had its own host of problems).
Is there really no MMO currently on the market that has cooperative group content as it's primary form of play?