Possible way to solve the problem with lethality.

From what I've gathered, assassins are currently weak because lethality is weak; thus allowing marksmen to become super strong cause assassins are able to do their job well enough. However, when lethality gets strong, marksmen start to use it and become super strong anyway, despite assassins doing their job. So may suggestion, is to make lethality items less effective on marksmen (I'm thinking by 40%). That way, lethality is still an option on marksmen, but is not overpowered; and assassins can actually do their jobs effectively.

P.S. in case anyone reading this thinks this an adc hate thread, just know that I myself am an adc main, and don't even play any assassins.