Deathloop is really fun. I like its presentation, dialogues etc. But I say it doesn't hold a candle to Prey and Dishonored.
The game is a bit weird at first, but once you get the hang of it, you're chasing leads, killing visionaries, take their power and infuse them and every weapon and upgrade if you want to keep. Then you can kill them again, to get a slab upgrade, which you also can infuse to keep. I had this Nexus upgrade that returned health on tether kills. I would tether 3 guys or so, use the throw force slab and regain all my health. But I didn't infuse it, now I got the nexus takes less meter upgrade.
So you're repeating levels, finding leads and eventually lure the visionaries away so you can kill them all. Thats what I understand (I have 3 slabs right now).
But Dishonored does feel better to me, its powers, its AI, its level design... Deathloop is like an arcade version of it, you can run and kill around easily.