What they should do is allow you to pick your reward. Make the rewards commensurate with the time spent of course but allow the player to choose. This way anyone working on any content in the game has a reason to run the MSQ Roulette.

Crafter/Gatherer scrips
Poetics
Top tier tomes
Second tier tomes
GC Seals
Gil
EXP
Cracked Clusters

They could even throw in FC items like Aetherial Wheel or Ceruleum Tanks.