It's hard to justify Veigar e nerf when Brand and Annie exist
annie has limited range, so she only gets to burst the enemy carry once he walks in her range, thats some counterplay
on the other hand brand has longer range but requires a set up, meaning that any skill he casts is a warning to dodge a skillsot, that way his cc can be unreliable
pre nerf veigar had both long range and didnt give you that reaction time, so when you comparing him to annie and brand his stunn had all the good traits without those big drawbacks
ofc it was a cage but once you got used to it you could use it as a point and click stun
well they are already buffing him back, because lets face it the stunn was only thing that allowed his kit to work, but the reason behind nerfing his stunn without touching the rest isquite valid