What content?

The 15 minutes to do Chaotic once you learn it, rinse and repeat?

The 10-20 minutes a week to do Unreal until you have to wait til reset?

The 15 minutes to do each Savage Run until you are numb from spamming it?

The 30-60 min 24-man Raid run you do weekly for coins or more to get loot until you are board of it?

Treasure Maps?

Extreme Trials which like the above a 15 min experience repeated as Nauseum until you get what you want?

The single quest of HIldibrand?

See the pattern here? Yes you can say there is a lot of content but the type of content is the problem. They've released repetitive encounter with little room for skill expression that you repeat until you get your rewards. At least something like a Field Exploration opens the door to some skill expression on top of being able to experience different encounters within the same area.