Something is wrong with Zed's W passive.

I am not sure if it is a bug or if it is intentional but Zed's W ad passive doesn't work as it used to but there is no mention by riot that they would change his W passive functionality.

Prior to this patch, his W passive changed and counted all bonus AD sources before it added it's bonus. It counted AD from items, ally buffs like janna shield, baron, wrath pot and Dragon buff. Now, it only counts just the item values.I tried the elixir because it gives a flat AD bonus but it still doesn't increase the AD bonus from W. I don't have to test it with baron, the result will be the same, it won't affect thebonus you get.

When you look at the W tooltip it shows you how much AD you gain from the passive, but now it doesn't change when you get the dragon buff. Before the first W AD nerf back in patch 6.7, his Passive changed to give a new bonus value based on the raw sum from Items, runes, masteries buffs, elixirs and Dragon buff. Now, after the patch 6.9, his W passive only factors AD gained from items instead from all sources and that's a big hit to his AD late game. Is this intentional or is it some kind of bug? Prior to this patch, his W passive gave you significantly more AD and this change removes a lot of potential damage and hurts his gameplay a lot.

If it is intentional, why wasn't it mentioned in the patch notes? it's not a small change, it's rather big and significant. If it is a bug, please, fix this.

I understand that now that Qss doesn't remove his ult, he has a lot more potential late game but this is not a reason to make such a change, especialy without mentioning it. It's a clear and significant nerf to his AD potential.