i think that SE should give atma+ weapons a higher chance to receive atma stone than a zenith weapon like

zenith weapon : 2% (assuming its 2%)

atma : 8- 12% drop

animus: 16-20% drop

novus: 25- 30% drop

the new weapon :higher % drop


essentially, what i am saying, lets have the atma+ weapons give a higher chance to get atma stones. therefore keeping the grind the way it is (since SE doesnt want to change per live letter) and making the rng grind slightly easier on those who already have the atma+ weapons.