Veigar plays way too safe for how powerful he is late game.
He's a fucking ranged Nasus.
Let's compare him to other late game scaling champions
short range, easily abused in lane, countered by pink wards, 100% auto attacks
melee, gets kited, easily countered by peel and qss
does mediocre damage late game, can get kited after ult, easily dodgable abilities
no mobility but it doesnt matter because he just 1 shots everyone from far away and if anyone jumps on him, he's got a zhonyas and a stun
Add some risk to this guy. doesn't matter how much MR your adc gets, he's still gonna 1 shot them by pressing r.
. He won't be able to one-shot you if you have it up. If he attempts to stun you, the item will proc and keep you from getting stunned, thus keeping you from getting one-shotted.