Penetration changes?

What if Oblivion Orb/Morello/Sorc Boots became % magic penetration instead of flat and lethality items gave adaptive Damage and adaptive flat penetration to be viable on both types of champions? And maybe give new options to AP jungle champions to build

New item - Crystal Soul Long sword + Amplifying tome + 50 gold +4 lethality 10% CDR

Night's Edge Basically the same but with adaptive pen and damage Well balanced for either damage type builders

Duskblade Serrated dirk + Crystal Soul + 1000 gold Now +19 lethality Night stalker now procs on none AOE spells (jhin Grenade, Nidalee spear, Evelynn whiplash, brand ult), leaning more to AD champs or hybrid damage champs

Ghostblade Serrated dirk + Crystal Soul + 1000 gold Active now grants on hit magic damage scaling with AP on the next 3 AAs during the MS boost duration, leans more towards AP champs or hybrid damage champs