P.s. yeah, you were right about Watts not being married to the idea of a "god". I found this quote attributed to him, which clears that up a bit.
“For spirituality is a deep sense of inner freedom based on the realization that one’s self is in complete union and harmony with life, with God, with the Self of the universe of whatever that principle may be called. It is the realization that that union has existed from all time, even though one did not know it, and that nothing in all the world nor anything oneself can do is able to destroy it.”