Quote from Code2008;1272082:
No she doesn't. Morrighan tells you to go give Neamhain her powers back after you steal them from Nuadha in the final battle. The Curse being lifted was due to Morrighan said the gods would quit meddling in the world's affairs.
You don't steal anything from Nuadha in the Final Battle....
You're not keeping up with the Lore huh? What exactly does Morrighan say? Yep you can't kill Nuadha because he's too near to be an Absolute God.
How did he achieve that? Yep by absorbing Neamhain's Powers.
If we stole them from him he'd lose that state and thus we could've killed him, but we couldn't and were only able to imprison him.
On top of that we can't drain Neamhain's Powers anymore as we already posess them.
Edit: Rewatched the Scene.
After Imprisoning Nuadha Morrighan says the following:
"When the light of the Soulstream first led to Erinn, perhaps it marked the beginning of a new era.
You could have chosen to become a God, yet you didn't give up on the human race.
Maybe this enduring, presistent stubbornness is the power said to be held by the Milletians.
The Prophecy that told of a hero that would come from Falias was ultimately refering to you.
<Player> You will now return to Erinn as a Hero.
You are now also responsible for leading Erinn to Tir Na Nog, the eternal paradise.
Nuadha's goals may have been prevented but the opening of Falias will bring much change.
I will now send you to Neamhain
Use the powers of the Milletians
to rekindle the light of the Goddess."
Leading Erinn to Tir Na Nog was Neamhain's Job, So we DID get her job. Just not because she died but more because she did a horrible job at it
Well yes i forgot about the part you're appearently sent to Neamhain, but we never stole anything from Nuadha, she tells us to use OUR power to rekindle Neamhain's Light.
If we actually did it is unknown! We never see us doing it XD