they took the bonus damage from his ult vs non mana users out of the patch. it was said they were planning on changing him in a future patch and will change his ult then.
T_T why did this happen... they coulda just left it for us for now =S, i hope the rework doesn't change him too much though
And it's true that you get the same if not better result off another champ for less effort (read. Annie/Anivia) but veigar snowballs slightly better (i only say slightly cause it's not like you get buckets of bonus AP)... only point i had really even if it's not a very valid one, I s'pose you're right in the fact this makes him underpowered but it makes him a good pick if in some super fancy game if they have a ban on Annie, if you have a player that can play a good veigar. Point i'm trying to make is it's possible to still main Veigar and not perform worse than if you chose a higher rated caster
Tbh i expeceted that buff for veigar to come through so i'm kinda second guessing now about him what with the amount of mana-less champs now... guess his upside is still that he can still blow up casters faster than anyone else =S, he's still not as underpowered as people make him out to be imo, if he has potential to be on par with the higher tier casters then he's fine in my book although let's hope this supposed rework does sumat good for him,
Imo better synergy between dark matter and event horizon (cooldowns are very far apart, means he can only throw something in a teamfight every 20seconds, they could make the stun shorter but have a faster cooldown or something) and a buff to the ultimate is all he needs