Can I just make a comparison? Yes? Well, here it is then:
Everyone knows tekkit, tight? Well, our crafting system looks a lot like the crafting system there. And nobody complains because it is a mod. So why must everyone complain that this game has a difficult crafting system?
Also, I don't know how many times I wished I had a calculator while playing tekkit, so now I want a calculator here. It is not that the crafting system is too hard, it is that you eventually will need loads of capsules, and I don't fell like calculating those numbers in my head.
As for the notepad, yes, I am too lazy to get up and get a pen and paper. But why should I have to do that in the first place? The game should provide me with all the tools I need, including a notepad of some sort. Because I really don't feel like going back halfway through a mining expedition to see what it was I needed again.
But:
I'm glad you like the display module idea, because I think it will help a bit, since you won't have to go back and forth between recipes anymore to see what you needed.