I'd
Larian have already said they are implementing a crating system so I think the best feedback would be how you would like it implemented rather than if you would like one or not. Have the ability to disable the crafting system if it bothers you that much. I agree however the last thing you want is 5000 items lying about with no idea what they do or needing to read 50 pages of a wiki to figure out crafting recipies.
Ya alright, my take would be related to 3.5 since I have no clue how it's handled in 5e. Crafting magical items required prep spells, material, gold, an xp. You would sack more xp for higher level stuff once you hit the proper level, but you could not down level yourself. Brew potion was a low level, where wonderous item was higher.
I'd like to see each category for crafting: potions, trap, scrolls, etc.
This is off the top of my head, about to go to work & have no source material on me.