Eh, I think Yahweh is okay, although strict training in Biblical studies has taught me to spell it YHWH (I think I hear the words "no vowels in Hebrew" in my sleep these days...) I liked the use of religious imagery, especially for Chase, since you can tell how deep his faith, however flawed/incomplete it may be, goes. Well done.
I liked it alot. Except the use of Yahweh. Most non-religious jews don't use it. This is because the word that is spelled yud-hey-vav-hey is usually pronounced Adonai.