Weary merchants will now include a shining steel breastplate if you opt for their heavy armor variety.
They will also exchange clantrinkets to their base items again -for a fee of 75 crowns per item-. Simply give the weary merchant the 75 gold crowns and then the item you wish to exchange. He will sit down and then exchange the item.
Note that at this point, the coat bearing the ancient symbol of the Aes Sedai has no equivalent and will not be exchanged.