This is referring to this part of the patch notes:

New treasure chests have been added to Dzemael Darkhold.
Monsters in certain behests now drop new items.
* These items can be obtained regardless of quest acceptance.
New rewards have been added for high-level caravan escort missions.

This section is about Relics, and items dropping in these 3 new spots involving relics... HOWEVER the only 2 new items added were

-Commemorative Coin
-Legionary Visor

I doubt the Visor is what these are talking about, and from the Coin's description it actually sounds like a reward from the new GC quests so my question.

This means the "new items" from these 3 additions already exist in game.

Did they add more area's Inferno, Vortex, and Tremor seals appear?
Will we need beastman coins at some point to progress in the quest and beastman now drop new/more coins?

It might be totally for the parts of the quest that no one has reached yet but since no new items were added that they could be it means they are items in the game already, yes? So what could they be!