So here's my thought process on Pineda:
1. Was he getting any actual on-field benefit from whatever banned substances he was taking? If he was, you've got to assume some performance regression next year.
2. What's the temperature in the clubhouse towards him? Are players bitter towards him or are they forgiving? Next year, would he be a good or a bad clubhouse influence?
Assuming the answer to #1 is that he wasn't getting any on-field benefit from the substances and assuming the answer to #2 is that the player are forgiving an he's a good clubhouse influence, then I think he is worth the QO. He's had enough flashes of effectiveness in his career that I think there's a good chance everything comes together for him and he posts an ERA in the low-to-mid 3's next year.
If the answer to those two questions I posed goes the other way, I don't give him the QO.