Hey, thanks for sharing it around. Certainly makes my marketing job easier.
Lore-wise my only issue, and it wasn't much of an issue, was that I wasn't thinking of "the darkness" as a living thinking being, but as an essential part of nature, far beyond even the Gods of the world. It's not set in stone or anything, and I'll change it if I think it's necessary.
As to your ideas those do sound like the sorts of things I was going for. I actually already had a card-based God I wanted to try, based on how the game was originally set up, way back in January in its first week. You don't have set powers, but are given cards at semi-random (you can choose what deck to draw from) and so have to adapt your strategy to fit the cards you have available. I didn't like it as it was, but it would work well if combined with the existing mechanics, I think.