At least revert Veigar's Q....
Veigar is a Single-Target-Burst-Mage! Why are you turning him into a longer range poke mage? I can simply play Xerath or Vel'Koz if I wanted that type of playstyle. Revert its cooldown to how it was before patch 5.4 (8/7/6/5/4 instead of 7/6.5/6/5.5/5), reduce its range back to 650 and make it targetable!
Also, maybe increase its AP stacking to 2 AP on small creep kill and 4 on siege minion kill (don't change the amount of AP you get from champions). That would be a step in the right direction. For his E, I think reducing its delay to 0.60 from 0.75 would be nice (the cage would appear in 0.35 seconds after the cast animation from 0.5) Or just rework it completely if you nerfed it because of the Veigar support picks... (Give it a stacking system like Cassiopeia's passive, depending on his Q stacks, for example: 100 AP stacks: the warning/pop up delay is reduced to 0.5 from 0.75 200 AP stacks: instantly creates edges which stop dashes before the cage fully appears 400 AP stacks: the cage appears instantly (could be changed) P.S: his cage upgrades depending on his Q stacks NOT his total AP!!!