Finally got around to reading both Luthor and Faith vol. 1: Hollywood and Vine this morning. I thought both of them were just okay, despite the potential they had. I'd give both of them a 3 out of 5 star rating.
If you want a more in-depth review of both, you can read my GoodReads reviews:
Faith vol. 1 <https://www.goodreads.com/review/show/1754076898?book_show_action=false>
Luthor <https://www.goodreads.com/review/show/1752370662?book_show_action=false>