As individual module or (better) as part of a rework of the CraftResults Module
A feature to better analyze crafting mechanics and behaviour
For Example:

Proc Behaviours (Multicraft item amounts, Resourcefulness ratios)
Cooking crafting item count result ratio to skill
Prospecting Item Ratios (with skill / talent consideration)
Disenchanting? Item Ratios (skill / talent consideration)
and more..