I just learned about the NWoD book about Deviants. Let's just say I hate the concept (psionic people, the Fly, and Cyborg from Teen Titans does not a coherent book make), I hate how the monster design works (oh yeah, you can be as powerful as you want. There's penalties to making yourself stronger, but that requires the DM to be able to balance the game for the rest of the party), I hate how it's basically just a stitched together book (and that's not a clever meta thing, it's just desperate for product). And last but not least I hate how the idea is just a bastard spawn of two other series like Beast was.
It just feels like the exceptional spawn between Changeling and Prometheans, just like how Beast was a horrid crossbreed of Mage and Werewolf. It just has a more disgusting power creep that relies too much on the DM balancing the party and gives the players too many opportunities to explode outward with special snowflakedness in a setting already rife with it. It legit doesn't really match the setting given it's a sci-fi thing in a world of the supernatural.
The only thing it has going for it is it makes the Deviants sympathetic, unlike Matt McFucksKids with Beast.