^ You can do all of the above without having dozens to hundreds of crafting ingredients strewn across the world and in merchants' inventories that inevitably go into and clutter up my inventory. Literally everything you mentioned can simply require a recipe + tool kit + perhaps equivalent gold cost + perhaps appropriate spell; recipes could be the interesting crafting finds you obtain through exploration/merchants.

+1 billion to @Zellin's explanation; well said.

But if Larian does decide to go with an overly-detailed crafting system, please please at least implement @Sozz's suggestion of a Herbalist+etc crafting pouches that everything automatically goes into. And no, backpacks that I can manually put ingredients into aren't the same, even considering the fact that further ingredients are then placed in those already-existing stacks.