I've been thinking for a while that players should be able to easily access their crafting page in-shop and, while I know and use the keybind, I think that KI can make it simpler.
Why not add to the interface a list of recipes that use the material. For example, I hover over Black Coal during a transaction and I see that I need 4 to craft a Dagger of Absolution. I think it'd be easier than switching back and forth between the Crafting tab and the shop. KI could also allow players to highlight certain recipes to focus on where the above UI additions could be added, or just allow players to highlight recipes in general so they can see them from the top of the Crafting tab.