ADCs have too much lifesteal now

The reason why adcs were so op in season 2 was because they could really easily get something like 40% lifesteal from runes, masteries and items. As long as most of the damage threats on the opposing team were dead, you could literally sustain off the remaining tanks.

With the new lifesteal mastery + keystone mastery + buffed red pot, no one can kill the adc unless they oneshot them. In the seasons since season 2, all the champions that could oneshot adcs have been nerfed to the ground.

I think ADCs were in a far better place in season 5. They had a ton of damage but only 20% lifesteal. They now have the same damage but 40% lifesteal with just 3 items + the keystone mastery.