[2022] Is the Whispering Ice buff still a nerf or am I missing something?

In the patch notes we got

Icestorm (granted by The Whispering Ice Unique Staff): Now has an Added Damage effectiveness of 100% (previously 60%), which affects the 3 to 5 base Cold Damage per 10 Intelligence that the Skill grants (this is a buff).

So yay 66%(Edited thanks to u/Kaelran) damage increase right? But damage effectiveness never affected the 3-5 base damage.How do i know? I ran this test

Get on a witch, equip Whispering end up with 103 int so If there is no damage effectiveness in the 3-5 then my on hit damage should be (103/10 * 3~5) * 1.1(increased spell damage) = 33~55

If there is then it should be (103/10 * 3~5)*0.6 * 1.1 = 19.8~33

And on the character sheet i have 33~55. I also tried killing low level mobs and seeing how many hits it takes and the results from that are consistent with this

So the 40% buff is actually 0% buff because the build doesn't use added cold or any other sources of added damage.Paired with the fact that all WI use CWC or CoC this is still a nerf in the end.

u/Community_Team was this an oversight? Is it intended?If it is then it seems ironic with the (this is a buff), WI will probably be dead with this.

If i missed something please let me know. I really want to league start this but it seems like i came a league too late.

TL.DR: Whispering Ice wasn't buffed but actually nerfed.