Well,
These are upcoming hot fixes ( in the next day or so )
[UPCOMING HOTFIXES]
All class set items will now only drop in Torment I or above.*
Reduced the amount of experience granted by monsters with lower than average health pools.*
So, basically Set items are not going to drop for us in our normal fast runs and those low health cota runs are pretty much over when this hits.
Sorry :/
Source: Patch 2.0.3 Hotfixes - Updated 3/21 - Forums - Diablo III