If the games direction is making us to invest into submains/legions; which I'm sure in the future they'll add more challenges to the legion champion missions for more power creep. There needs to be more outlet for fragment gains, along side with new skills requiring thousands of frags at the pace of heroic farming rates (which for whatever reason has a huge variance of fragments per hour) I don't see how people could invest into the mules for progression. There's so many ways to incorporate frags into the game to make some type of 6th job progression in the mules without have to spread our net out so wide or just hit an inevitable wall.
