Only old treasures are there and you don´t need a map to find them. You can always dig them…
But new ones with new clothes/armors, weapons and potions should be dynamically generated.
Do you know the game Stalker? There are many Points of Interest, but only if you get an (useful) information, they are filled with a good loot.
Maybe WH has planned also such a system. Think of all the POI in the game… There are many, many without any loot.
So for the Treasure of the Past you need the maps… because it´s a DLC
Than there should be some maps you can find old stuff but not in every new game in the same place and loot.
(Maybe you can find only one part of the map… and the places should be more dangerous).
Getting rich with treasures shouldn´t be so easy in the game. Even in Hardcore mode it should be more difficulty.
And at last some random stuff in dynamic places… You hear some rumors in a tavern, … a traveller tells you a story, or a bandit surrenders and gives you information for his life…
I think this would bring much interaction and immersion.