Veigar Is Not OP
If you truthfully think Veigar is op,then sit down and let me tell you how I became the prince of bel-air.
No but seriously,there is only one ability in his kit that is obligatory to take,which is his ultimate.Every other part of his tool kit is subject to counter-play.You can dodge his Q,you can dodge his W,you can dodge his E,and,he has sub par autos.Is he a strong setup body?Yep,his stun makes great set ups,even better when it was instant,but you can actually dodge an even godly placed stun with well thought out decision making.Veigar,doesnt have an identity.
Is he a:
1.Control mage(stun,low mobility,set up time required for combo,like lux)
2.A poke mage(Q is very consistent poke/fast projectile etc.stun can be used for disengage)
3.A burst mage(veigar ultimate can delete squishies,especially AP ones)
4.Or a late game scaling mage(Q allows for very decent to modest AP by late game,reaching past 200 easily in an average game)
Veigars kit is so strewn between many different concepts that his identity makes him appear OP and overloaded because he can do a lot,but in the end he is weak(er) than his previous iteration.Veigar is "Jack of all trades, master of none".