Ma'am, you had me at "defunct sea gods"!
There's great world-building, character development aplenty and an exciting plot that plays out against a backdrop of big themes like loyalty, courage and above all integrity (metaphorically, literally, ecumenically, too, I shouldn't wonder!).
The redundant old priests and "god-ware" tech were bonuses.
I enjoyed every minute of listening to this (even if the toxic friendship parts were painful)!