I liked HnH slow quality increase rate, I know here we should get 100% in all 4 elements, but still +10% is way to fast.
Imho it should be like in any other cases some sqrt or other fucntion, so getting
~40% element (salt, merc, sulf, lead) should be like it is now +/-10% (fast),
but above that level you got +/-5% each harvest, above ~80% element only +/-3%
