I would like to have there poisonous mushrooms that only Nature's Lore peoples do see that they are poisonous and that person have to tell cook that they have to be boiled first or you could poison whole village with your food by accident. (or that you could dry some poisonous mushrooms and do some invisible poison what you can add to your food or drink...i could think many things where that could be useful, kings would need tasters, poison your enemy at peace meetings and etc.)

and why you have to use only fresh herbs with potions why not use preparations like boost your potions? Its kind of making preparations making useless that you do potions only out of herbs or do i miss something?

There could also be something like herbs that grow only at night, winter and/or north (so that you have to stock them then or go long way to get them in summer), near water and etc....Something fun to do that you don't need to just gather and gather and gather...i don't know about other herbalists but i am pretty sick of always gathering this blue flower over and over and over and over again with out any change.