Sorry, I have a hard time putting my thoughts into words, but those still seem the same to me. Claiming absolutely that there is no god and one couldn't possibly exist seems unscientific since it's based on faith, while every atheist I know admits a god could exist. I don't see the need for the term "agnostic". I don't know if that makes sense, I'm bad at explaining things 
Those are some good examples! Those are the kind of things I wanted to say but couldn't think of at that moment 
I have to explain and defend my take on things to people in my surroundings on daily basis - since the wars in Balkans, after some 50 years of communism and atheism as a popular stance, people went back into religious, I might say, madness - rituals, rituals, rituals, lack of empathy, sheit load of prejudices and very shallow understanding of what faith is (either we talk about Christianity (orthodox or catholic) or Islam). As an agnostic, I don't deny existence of higher power, I even believe that there is some sort of purpose, perhaps order even, but I also say - I don't buy what religious institutions are claiming, nor do I acknowledge their point of view or their perspective on things 'cause humans tend to distort history, tend to bend everything for power, and so far I didn't find any good evidence for what they are claiming to be truth... I believe in science, but also, somewhere deep inside me, I feel like there could be something more, something that is empirically hidden and can't be perceived as an axiom. No human created religious organization can take me into blind faith, and yet I don't know if there is actually a higher thought, power, being - that's why I said that for me agnosticism is more viable option for me in DA world.
My HoF, Hawke and Inquisitor do search for the fragments of truth, they will not deny higher purpose or even beings when there is sufficient evidence that those are not political or historical constructs - and they believe that there is something behind the curtain, but in the same time, they won't submit themselves blindly to any of Thedas religious systems - 'cause they've seen too much already to know - those are not accurate accounts of events in most cases. An atheist simply denies existence of something more that is above empirical - agnostic says, I don't deny it, perhaps there is more to it, but as it is, I don't know if it's true or I don't see it as true. 
Anyway, I can't be an atheist in DA world 'cause I've seen too many strange things to deny existence of higher plan or purpose, but as an agnostic, I feel comfortable when I say - I don't know if the Maker exists, but when it comes to Blight, I can assume now that it wasn't his punishment for the misdeeds of human kind - it's seems more like humans (read Tevinter magisters) were collateral damage or intended result of something that is older than human idea of omnipotent but silent being - and yet, somehow, it's all connected, thus I believe that in the beginning there was some vision or plan but I don't know if it was Maker's doing, or something else, beyond everyone's comprehension or knowledge. That is damnation of mortality, I guess - the truth gets lost and distorted.