If you can you should add armor smithing into the game. that would be cool with weapons and shields. There could be things like helmets and breastplates, whatever you can. Also maybe having an option to toggle a mode where multiple customers are at the desk and request items and/or instead having some costomers ask for multiple items. ;) This game is amazing so far i love it :)
If you'd like to keep up to date on the current progress and plans, check out the Trello page for MLBS HERE. If you look under the planned updates, you'll see that Update 0.0.9 is planned for having better AI interaction with the player (might include multiple customers at once or customers asking for multiple items), and Update 0.1.1 is title "Weapons Galore" (that one seems self explanatory). Happy Smitihing!