Dear Lord, I hope it's not too late.
My list is from the user standpoint, NOT as a UI developer:
1: better recipe handling. Something like a treeview to browse back and forth between end recipes, resources and back. Oh, and make it so I can click on items which don't have an icon in the recipe view, so I can easily find out what I need to make something
2: fix /loadhotkey and /savehotkey. currently it does not load or save blank hotkeys, and it also resets macro icons, effectively making it useless.
3: fix /loadui
fix those three, and I (as a user) will be happy happy