The Veigar rework wasn't that bad, I know a bunch of people dislike them but he was overpowered, his stun was instant and you had to be blind to miss it, not to mention you didn't even have to legitimately hit them since it's a box. His Q and R were skillshots and he could easily instakill people with very, very little counterplay to it.
Currently people are complaining about Leblanc having no counterplay to her, the only difference between her and Veigar was that he wasn't hypermobile, he was definitely more balanced though. He had to get much closer with less of an escape, but either way he just instakilled people and you couldn't do anything about it such as dodging.
The current Veigar could use a buff, preferably to his Q so it did more early game damage. Otherwise I think he's a great mid - late game champion since he can easily get more Ability Power and his Ultimate can one shot (yes, one shot, just the ultimate) a lot of AP Carries. Cassiopeia being an example of this, he just hits R and one shots her. However, Veigar still could use a small buff.
All in all I sort of like the rework but Veigar still needs a buff to his Q damage.