User blog comment:Willbachbakal/(Champion Rework) Vladimir, the Crimson Reaper/@comment-7709681-20150103033059/@comment-1330314-20150103105158

Considering the above passive encourages Vladimir to not autoattack for extended periods of time in order to inflict the most damage, I think any kind of an on-hit build would be hugely wasteful on him. I also made specifically sure he still had to build tanky, which is why I gave him health ratios, only this time he needs to actually build health instead of gaining it for free on a full AP build.

While I did move his ult's damage to his passive (his other abilities actually scale better, since they have lower cooldowns), that also means he can proc the passive to deal damage more often, so overall he gets to scale better with AP than now. If you were to build in in the same way as now, you'd likely get the same overall amount of damage and resilience, only Vlad's damage would scale with damage and his sustain would scale with tankiness. At the same time, you'd get to choose to become a much squishier champion or a super-tanky bruiser, which is better than his current way of always turning into a tanky DPS dude (and which, consequently, means only one main progression, AP or health, tends to be valid for him).