I know I shouldn't be putting out an opinion on him so early.
But he's SO FUN TO PLAY. Even though he might not be as efficient as some champions that commonly are seen as upper Tier, he brings some new concepts to the table. While I do understand he can rely on the team at times, he is a thrill to play, and I think Riot did a great job at doing something original and that doesn't break the game for 2-3 weeks. Congrats on this champion guys! I even bought the Marquis skin for him!
On top of being fun to play, I almost don't see him on Normal Games right now! So don't expect a lot of mirror matches!
As I said earlier, Vladimir might not be the best champion in all situations, but he's definitely far from the worst. So if you have spare IP and want to try something new, I definitely recommending taking a spin at this Sparkly Vampire(TM, Sunfire Cape not included). Just remember that video games are also about fun, not just ranking(It's also about murdering people in a bloodthirsty fashion, YESSSSS!)