Typical Japanese drop rates... <0.000000000never%.

But I agree. Certain NPCs, harder ones, should drop cards more of the time. Also, if a gold card pack drops cards 3 and 4*, I should have a chance to always get 1, 2 and 3. Not lower tier cards like Mother Miounne...

It'd be like having a drawing and guaranteeing $50, $75 and $100 dollar prizes, then giving everyone that participated a buck.