It would be nice if the crafter had functionality similar to an interface (like AE2 interfaces) - allow it to accept input items and store them, and as a bonus allow them to supply materials (with autocrafting via crafting cards).

This is super nice when a machine is capable of auto-outputting out of a side - it means you don't need an importer on the machine. Bonus if it can accept fluids too!

The item supply is nice for things like Mekanism Enrichment Chambers, that need a steady supply of an infusing material.