Duskblade nerf to remove hidden power

A healthy change to duskblade that I think would be a great way to make it more inline with its twin ghostblade is to remove the indicator for the "Unseen" passive. It seems odd to me that this weapon can be used as like a ward radar to detect what areas are warded for setting up ambushes. For those that don't know: pinging the item in your inventory tells you if there's a ward currently spotting you, and is supposed to be used to tell you when the extra damage passive is up.

Now from game experiences, I know that not many people actually abuse this item in the way describing, but I certainly do. It's invaluable when setting up ganks as an assassin because if unspotted, you can count on your enemy to eventually be out of position. This item removes the uncertainty of sitting in a bush/river and constantly asking yourself "am I wasting time by waiting because I'm spotted?". Instead you just ping the item and know instantly whether to come back from a different angle, or to wait for the opening.

Lategame for Kayn and Talon, this detection ability also has huge benefits when sieging the 2nd and 3rd tier turrets. If you know that over the wall is unwarded, it gives you the knowledge that you can strike from behind in the event of an engage from either side without being turned on instantly.

Tl;Dr - Remove the ping effect that tells you if you are spotted, it turns any assassin (or adc...) into a ward radar that can be used for setting up ganks, ambushes, and flanks for free; the blackout passive should be used for that.