After Armor Pen, Frozen Heart only gives 47 armor
crying softly
crying softly
crying softly
Assuming 80 base armor- Against old Whisper: 110 effective armor Against new Whisper upgrades: 127 effective armor
Why are you crying again?
This is a damage nerf for anyone that uses Whisper.
This is a buff to a Tank's ability to Tank, since forcing an ADC to build Whisper means they're gimping their damage against the rest of your team.
Assuming 80 base armor- Against old Whisper: 110 effective armor Against new Whisper upgrades: 127 effective armor
Why are you crying again?
This is a damage nerf for anyone that uses Whisper.
This is a buff to a Tank's ability to Tank, since forcing an ADC to build Whisper means they're gimping their damage against the rest of your team.
No, the tank won't tank jack shit, Just the ADC will do less damage to shishies then they would have otherwise.
A large part of a tank's role is to absorb damage for the squishier members of their team. An ADC that builds BonusArmor Penetration sacrifices potential damage against squishies in exchange for damage against tanks.
A tank that poses enough of a threat to force enemy ADCs to buy BonusArmor Penetration has succeeded in (a large part of) their role.

If they're gonna invest that much into armorpen, just grab health. Sure, it won't help much against Vayne and Kog'Maw, but with the nerf to BotRK, health stacking will become much more relevant against all other ADC's.
If they're gonna invest that much into armorpen, just grab health. Sure, it won't help much against Vayne and Kog'Maw, but with the nerf to BotRK, health stacking will become much more relevant against all other ADC's.
This man speaks wisdom.
BotRK's passive is getting nerfed down to 6% damage as well, so stacking HP is even more viable. Because the new Whisper only punches through bonus armor, that makes HP a harder soft-counter against it than with the old Whisper.
Semi-soft counter?
This also makes champions with %Armor shred much more valuable to teams with heavy physical damage.