"Recovered" Charr Artifacts now have increased rewards: an additional piece of charr-themed gear, one of the four legion keys, and double the chance of receiving a Visage of the Khan-Ur.
There is an achievement collection demanding 3 of these visages. Nowadays only one is listed on the TP at 10K... so, the drop of this object was absurdly low. Anet seems aware, so they decided to increase it, and decide to only increase it x2. Also, we have to consider the population decrease of the map... this just leaves this achievement as impossible.