Look you guys aren't getting back the Old Instant AOE Veigar Stun, So stop crying
Its not gonna happen, period, a champion doesn't deserve to have a Instant AOE stun, with no reaction time that can hit every champion for a stun duration of 2.5 seconds. Its just not gonna work. Riot can do many tweaks, and edits to veigars kit to eventually bring him up to par with all the other mages, but for now stop complaining about veigars new stun and that you want it reverted, because i gurantee you 100% RIot wont go back on that decision. Veigar was never really strong before, infact weak, and he could never be buffed because he would become to strong if he got buffed because of his his AOE stun. Riot will eventually tune veigar out and make a him a good decent champ. For now you guys just gotta wait, kha'zix was shit after his rework, and Riot Gradually brought him back up, and i PERSONALLY think he's in a preety good spot, not to strong not to weak.
Tl;dr Stop complaining :), that instant AOE stun ain't coming back. 