What if lethality scaled with how close you are from enemies?
If you're in 100 range, you get full value of lethality as armor pen, and for every 100 range increase, you lose 10% of lethality, with it providing no armor pen at 1100 range (or something similar, numbers up to change)
This may or may not be stacked with the enemy level thing. Since lethality is an assassin stat, I think it makes sense that lethality do more damage close up. This would also help with ranged carries from abusing lethality.
Thoughts?