Key + Mori debuffs
Eboni mories can kill 1 person after hook, and they can kill from a standing position (tombstone myers), but keep other mori's the same.
Key's require you to channel when opening the hatch with them, which you can be grabbed off and resets when you let go.
Seems equal imo. Eboni's aren't just doom for an entire team and there's no hatch rushes (someone sitting on hatch waiting for killer or they come across it while running). Stops mori's winning games singlehandidly, and stops keys being an escape all, and only gives you a safe hatch if you're not in a chase.