@Riot, since you changed Nasus' stacking mechanism on ARAM...

Can you do something about Veigar's?

Nasus' stacking mechanism was buffed because it is balanced around being able to farm it up in a solo lane on SR, which did not translate well to ARAM. Veigar's passive is quite the opposite on ARAM however, he gets much more frequent opportunities to stack it, causing him to get absurd amounts of bonus AP. Maybe remove his stack increase on hitting champions with abilities?