Hello,
For next patches, if possible, I would like to suggest the addition of a "pity counter" for fragments.. overall they have 7% drop chances, but bad luck is always there. For example, I killed around 40 times Azmodan without a single fragment dropping. So, in this case, the pity counter would help me and force the drop of the fragment after a certain amount of tries...
This concept is already used in many games (to avoid players' tears for wasting hours on a bad luck run) maybe it's possible also here