So a bunch of us got into talking about how we could make crafting more interactive on discord, and I said I would have a go at posting some ideas here.
1. Option for interactive interface to enhance crafting.
Could have a standard 'click and craft' option for those who want a faster route. This would cost the standard amount for materials. Take making a sword - 5 bars of iron, 3 portions of flux, smelted at a constant 800*C (numbers completely made up, I have no idea how to make a sword). This would be the usual, easy 'click and forget' crafting system seen in many games.
However, you could choose to go for the 'craft unique item' option where you enter a forging interface. Here, you could do things like adjust the temperature, control how hard the metal is hit, alter the amount of flux used, and your interactive skills could be unlocked and improved through the crafting skill tree (much like the antiquities system in ESO). This system should be higher risk but higher reward. If you muck it up, you get a badly made sword and use up more resources. If you do it really well, you could use fewer resources and create a better item. This system could be really fun to use to try to get the best quality items - risk loosing the best materials with the reward of potentially crafting the best items. It would also mean that the very best crafters in the game would have to understand how and when to change the temperature, adjust the amount of flux, when to hit harder or softer, in order to get the best results. Could even add extra ingredients for unexpected results to promote experimenting, like creating new alloys. They really would be and feel like master smiths.
2. Structured crafting planning.
Create some form of planning structure where you can adjust quantities and suchlike, a bit like with the EVE Online planetary and manufacturing systems. This would allow players to try to achieve the maximum efficiency for using resources getting the best quality goods possible, with new tools and options unlocking as your crafting skill increases.
Those are some ideas so far. Please feel free to add more or tear these ideas apart as appropriate.