Mordekaiser tweak; trade some base dmg, for bonus resist penetration

Watching worlds I see the few games Mordekaiser slips through he is a tanky behemoth that can mow his Q through your team right?

Since he is supposed to be an ADC replacement I think it's expected he puts out sustained threat right? Sometimes he grabs one of the enemy teams carries and runs away with the teamfight.

What if we gave Mordekaiser the Yasuo ult treatment and incorporate bonus resistance penetration somehow and in exchange we reduce his base dmg or ratios somehow. The idea is he'll be less likely to flash 3rd Q cheese a carry, but still mow throw a frontline like a carry he is intended to be.

But can this be done without messing up his laning or middle game against a supposedly squishy bot lane carry..??? And does the approach even have merit.