I don't really know. I admit I haven't used that mod, I was just linking it to counter your claim that no such mods exist for 1.9+. However, the description raises a point that you'll need to think about when making an uncrafting mod: a lot of recipes use the ore dictionary, making it difficult to reverse the recipe, because there are many possible input combinations of items that could have been used to craft a given item.
The example given there is a chest. It could have been made from a combination of birch planks, oak planks, ebony planks (from Biomes O Plenty), and fireproof larch planks (from Forestry), or from all ghostwood planks (from Natura). Because of the different plank colors (and their usability in other decorative blocks where the plank type makes a difference, like fences and stairs), one might not want to allow free conversion between them. Also, some mods make the different plank types more or less valuable - for example, I just found out (while looking things up in the FTB Wiki) that different plank types in Natura produce tools with different tiers and durability.
On the other hand, some items that have multiple ore dictionary entries could be mostly interchangeable. A copper or tin ingot is generally usable in recipes across various different mods, regardless of which mod the ingot is technically from, so reversing recipes that use them should be safe, but how do you decide which mod's copper or tin ingot to return?