Random idea

So I just though of this idea and I want to know what you guys think. What if we made Nasus and Veigar’s stacking mechanic similar to Cho’gaths where after a certain amount of stacks on minions and large monsters they can only get stacks from champions and epic monsters. They can still scale infinitely but at a lesser rate then they do now and they get rewarded for taking objectives and helping their team in team fight instead of getting rewarded for going afk for 20 mins and then being able to delete people.