Those are semantic questions about labels and definitions that you're raising. In many of my articles I distinguish between exoteric and esoteric religious traditions. The former are most closely associated with theism, because they take the idea of a personal creator of the universe literally. That's the kind of Christianity I repudiate since it's unfit for enlightened purposes.

The esoteric traditions shade off into mysticism, pantheism, or what we might call philosophical or spiritual/existential atheism.

I'm an atheist in the latter sense, that is, an "old atheist" rather than a "new," scientistic, unphilosophical kind. I might be agnostic about some kinds of esoteric, mystical theism since they deal with negative theology or with ineffable mystical experience. But I'm not just agnostic about exoteric, literalistic, mainstream, juvenile theism. I think the latter kind is obviously wrongheaded and usually obnoxious.

I don't dismiss existential needs at all. There's a whole section on existentialism on the list of my older writings on my blog. (Scroll down a little above halfway, between Atheism and Cosmicism.)

http://rantswithintheundeadgod.blogspot.com/2013/02/map-of-rants.html