No, I meant like a setting for how much of an item to make (Currently you can cycle the amount of stacks, but you could add a setting that let us specify"Always 50 of this item regardless of stacksize" or something)
It's not like stack sizes are changing, right? When you set the limit you already see the limit as relative to the stacksize and as an absolute unit. Are you asking for the counts to not be relative to the stacksize (switching between maybe 2, 5, 10, 20, 50, 100, 200, 300 and 400) for all items, or are you asking for the ability to type in an exact absolute number for the limit?
Also, a blacklist system. It keeps crafting Repair Packs if my construction bots use them, and I'd like to be able to blacklist them from the crafting.
That is already a feature! If you have an item in your cursor and use the hotkeys to change the limits then the setting only apply to that specific item. You can also autocraft items that are not on your quickbar giving one of those items an individual setting.
If you haven't tried setting individual limits for items yet then maybe you don't even feel like you need the first suggestion once you have tried this. Test it :)