Dude he is completely BUSTED man. He is absolutely broken (at Silver levels of play) at all stages of the game.
I have to consciously decide NOT to play just Vladimir 24/7 because I feel that doing so will deteriorate my skills as a player because of how much stuff I can get away with and pull off with him.
All other mages have to work three times as hard as him in terms of careful positioning (or they get instantly blown up) in team fights at all stages of the game. His Blood Pool, combined with aggressive side step dances in battle, lets him get away with SO MUCH in Bronze and Silver its beyond broken.
There's literally no reason to work so hard to aim Ahri Charms, Viktor lasers, or Zed super fancy double/triple Shuriken combos when you can just pick Vlad, Ghost into the team, press R, and then spam Qs and Es and kill everything with almost no fail in Silver.
Like the amount of work and risk you have to put into immobile Mages and ADCs to MAYBE match his late game damage.... its really unbalanced in terms of the pay off.
Now it is true, I've played with Gold and higher and have gotten wrecked as Vlad (the enemy would lock you down with CC, their positioning would be too damn good) and you can feed. But I don't feel like the Vladimir pick cost me those games. If anything, it would have been WAY WORSE if I picked anyone else.
Yes hard CC shuts him down but the thing is... it shuts EVERYONE down. All carry champs in this game are bad against CC heavy comps. In fact, if you Pre Make a team, spam CC. Its the EASIEST way to win games. CC screws Vlad over sometimes but it screws everyone else even harder. At least you've got a Blood Pool and a Zhonyas to dodge/outplay some of it.
The more CC... the more likely you'll win (I think this is a good rule).
However, in Silver and Bronze they never consciously draft this. You always, 2/3 of the time get these absolutely TRASH team comps with low to no CC and even when they have it, they don't have the positioning skills of Gold or higher to actually shut down a Vladimir.
You can definitely get away with spamming Vladimir until much higher elo. However, I do recommend playing some riskier champs to keep your other skills intact. He just gets away with SO MUCH.
The other day a Blitz randomly grabs me from a bush. We throw game right? No. I hit R, hit Pool, my team engages... we ace them. That is some NONSENSE right there.