veigars infinite ap scaling

i know for a FACT that everyone knows those champions that almost no one plays but when they do pop up in a game they ALMOST (emphasis on the almost) always win and most of the time they win because theyre not seen often and people just dont know how to counter them but then theres those that are just a pain in the ass. prime example, veigar. i have noticed an increasing popularity of picking veigar mid and the only problem i have with veigar is the fact that after a certain point in the game his ult becomes a delete button and most people will tell me to build mr or something but building heavy mr items isnt always the best option on some champs. all im saying is what if his q gave him 0.5 ap per kill instead of 1 ap additionaly he could lose like a quarter of his stacks on death, maybe even less cause the passive on his q is what people know veigar for. also do something similar for nasus because if nasus does well in his lane, by the time teamfights come around he literally just walks up to the adc, withers and deletes. as i have said before with my posts these are just ideas