Warlord's Bloodlust Keystone mastery, Cloak of Agility, and Zeal.

Warlord's bloodlust is just ridiculous. 15% lifesteal that can proc almost as often as Sheen is pretty insane. Now that you can build Shiv and IE (or even just Shiv and Cloak) to get 50% crit chance (or 100% on Yasuo), you don't even necessarily need to build lifesteal items early on or at all. I really think Warlord's bloodlust should be nerfed from 15% every 2 seconds to something like 10% every 4 or 5 seconds. Thoughts?