Please do not touch Vel'Koz, he is the LEAST deserving champion of an update in the game
The reason Vel'Koz remains one of my favorite champs even though I don't necessarily think he's the most FUN to play is the fact that he is pretty much perfectly balanced as it is. Definitely the best champion released to date. Has clear counterplay and specific strengths and weaknesses and is gated by mobility and mana. Why? Why "update" him? You are going to make Vel'Koz extremely problematic from a balance standpoint as opposed to the current rendition of Vel'Koz which has only been changed once and that change was VERY slight and wasn't even necessarily a nerf, just a ratio change. Please listen to the community.