So Vel'koz ult is weird now.
I've mained Vel'koz ever since he was released, and quite honestly I don't think this was the way to go. I get the idea of allowing him to melt tanks, and I agree that was something he really needed, but it is far too gimmicky now. If you don't actually get your research done on multiple targets, then it is a complete nerf from it's previous version. This allows him to kill things efficiently in narrow teamfights, but I don't feel like this actually helped Vel'koz. I would like a compromise to be considered which would put him in a better spot.
I really like the Q changes though, so there's that.