I personally enjoyed the quest to obtain the amulet, but the amulet itself was very underwhelming given the quest and the lore behind the amulet. The lore suggest the amulet is incredibly powerful so powerful in fact that broken into three pieces it still gave the Gauldur brothers significant power.
The original amulet increased Health, Magicka, and Stamina by 30 points which is hardly worth it.
I increased it's power to something Gauldur's three sons would have killed him over.
It now increases Health, Magicka, and Stamina by 150 points, increases Health, Magicka, and Stamina regen by 25% and Resist Magic by 25%
I tried to make it as lore friendly as possible without making it so vastly overpowered.