User blog comment:JmLyan/Zenbakia, the Number Master/@comment-3476718-20130621180359/@comment-7481207-20130621233629

His passive is mostly useful to know the damage his Q and W does, as they by nature is predictable.

His Q does have alot of snowballing potential, but it requires him to only use it against a single champion and if he does die, it goes back to being nearly useless.

As I've said before, his W completely lacks scaling with his own stats, making it not actually deal as much damage as you assume (Veigar's ulti scales with 80% of his target's AND 120% of his own AP.). And 100% bonus AD scaling is quite little, so hybrid's would suffer far less from it than a pure mage, as 70% AP is much more than 100% bonus AD.

The reason his E is true damage is to go with the theme of directly subtracting hp from an enemy, which means resistances makes little sense in that case. It's healing isn't that great either, compared too Sona's which techinacally heals more plus grants an aura. And remember, Plus practically has 12 seconds cooldown, as every other cast will be Minus instead.

And his ult does have counterplay: Kill him. If he stays away from fights to not waste his ulti, then both teams lose one champion each, except that the marked champion can still fight just as well as it doesn't need to stay away from combat.

And his weakness is obviously teamfights. With his Q that requires the same target to be useful, his W being worthless except on pure mages or some AD casters and his ult basically wants him to stay away from fights, his E is pretty much his only team fight presence.