Oof, I would have enjoyed this so much more (at least a 3.5) if it had ended about 10 pages earlier. All the plots within plots and the carefully balanced plotters worked nicely enough, and Ezzedine's desperate loneliness and self-preserving forgetting of his home and faith and identity were heart-breakingly effective. But then the author couldn't, it seems, figure out how to end it, and instead gave us a hand waving philosophizing 'well, take your pick, here's all the endings I brainstormed' meditation on the multiverse.