Personally, I do commend riot for the keystones however

Aside from Warlord bloodlust the rest feel like they can be buffed/nerfed easily (Surprisingly undying has been balanced since release in preseason)

Currently I havn't tested or faced a warlord user and I do expect it on olaf/tryn however:

1. Who do you use it on?
2. Was it as good as another keystone you could use on the same champ?
3. Do you think it's easy to fix with a buff/nerf currently?

Because personally I feel like a lifesteal keystone even though their heart is in the right will just not work because it'll either be too strong on those who could use it or they'll just be better options since the lifesteal items are good in themselves.

Personally I think instead of a lifesteal keystone we could get something else, the question which I bet even riot asked when making the keystones is: Is there something else that can be used?

For damage we have TLD(Although i feel like it's CD should be 20 at 18), DFT, undying and fervor

For sustain we have Bloodlust(lifesteal), windspeaker, undying, str(or seraph needs tooltip fixing) of ages

For defense we have Windspeaker, bond of bros, str of ages, stormraiders

For utility we have stormraiders, windspeaker, bond of bros

I have an idea however I don't want to place it instead I want to see what everyone else has for an idea if they agree that Just lifesteal will be a problematic thing to balance