[dbrunton]

I'm not a Stoic, but I like your question. Would you mind too much if I slightly re-worded it? "...retained a positive outlook while projecting no intrinsic meaning onto the universe..."

I was raised with the idea that belief (specifically, The Belief That Jesus Died To Take Away My Sins) is the source of a positive outlook. I think this kind of a warm snuggle (if you can accept a violent and prolonged execution as such) from The Universe is lovely. But it has not been my experience that it has been particularly conducive to my own well-being.

To take this back to your question, rebuking the concept of god is not tied to my well-being either. For me, a positive outlook is largely distinct from cosmology. And a nice side effect of thoughts arranged in this way is that god, the universe, a higher power are un-fundamental. My philosophical approach can constantly grown and change, and that helps me act in a way that is kind and brave.

If you agreed to my rewording of your question up above, then my answer is "yes". YMMV.