I'm curious to hear your thoughts on what game the Faceless Men are playing. Why are they infiltrating the Citadel? Why did they recruit Arya Stark? (Do you really think she's with the FM by chance? No way.)
I think the role of the FM in the overall story is huge and fairly obvious, but most fans of the series can't see what's right under their noses.
The FM are agents of the Great Other. Who do you think is their One God of Many Faces? He is Death. He is the Great Other.
All of the Gods have their servants and agents in Westeros and Essos. Why would the Great Other be any different?
The Great Other is planning to escape his prison in the North and take back his world. To do this he needs help. The FM are paving the way for his return.
Skeptical? Don't be. It's all there in AFfC if you read carefully.
Where did the the FM originate? They originated in the slave mines of Old Valyria to combat the oppression of the Lords of Valyria.
What did Valyria have? Valyria had dragons, dragon fire, dragon steel, and dragon glass.
To what weapons are the Others vulnerable? See above.
Who brought about the Doom of Valyria? The FM did.
Why did they want Valyria doomed? Because the power and weapons of Valyria would be a huge threat to the Others, when they returned.
What do the FM want in the Citadel? The maesters were men of science, opposed to magic and dragons. The maestros played a big role in eliminating dragons from the world. They have knowledge and maybe weapons capable of defeating dragons. With dragons back in the world with the last (?) great Dragon Lord of Valyria (Dany), the FM and the Great Other desperately need the tools to fight them.
Why do the FM need Arya Stark? The powerful (but ignorant of his power and identity) descendant of the great Lords of Valyria is a huge potential threat to the Others. (I am speaking of course of Rhaegar Targaryen's son "Jon Snow"). Jon is well-protected and hard to eliminate. What FM assassin could get close to him and kill him? His beloved little sister, Arya.
I didn't read this theory anywhere. It came to me a few weeks ago when I was stoned and deep in thought after my 3rd reading of AFFC.
And people think AFFC is boring and uneventful. Haha.
I'm going to be proven right about this. Just watch.