Personally, it's not my style. I prefer names with musicality and
Azel kind of sounds like a blunt object. That says, I don't find anything unobjectionable about it; it just holds no appeal to me.
Pronunciation-wise, my gut instinct say "A-zuhl" (with "A" have the same sound as in "fate". Though I don't know much about Hebrew names, so I'm probably incorrect.