Serrated Dirk Lethality: 10 → 10 for Melee, 5 for Ranged

Youmuu's Ghostblade Lethality: 15 (on PBE, live is 20) → 15 for Melee, (7 or 8) for Ranged Active: Either halve the movement speed bonus gained from +20% to 10% or reduce the duration from 6 seconds to 3 seconds.

Edge of Night Lethality: 15 → 15 for Melee, (7 or 8) for Ranged Active: Shield duration lasts 5 seconds (or less).

Duskblade Lethality: 15 → 15 for Melee, (7 or 8) for Ranged Nightstalker passive (the true damage one): 75 + 200% Lethality for 4 seconds after being seen → 37.5 + 100% Lethality for (2 or 4) seconds after being seen.

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This will severely weaken many AD casters and all the other ranged champions abusing Lethality right now. That's a given. They're not even meant to have it in the first place. But completely removing it (while would be my personal choice) would probably not be a good one. A good chunk of the ranged abusers are not good with crit/attack speed/other itemization types.

So give them buffs through another way, instead of trying to force a mechanic that will be inherently different and abusive as long as there are no differences between melee and ranged.

I am not against the ones abusing Lethality getting buffs to make up for it. But they should not be forced to rely on an unintended and abusive mechanic to be not unplayable.