Having one Psychic getting information from the dead is already powerful and arguably game-breaking on its own, but having two coordinating information with dead chat and passing the information along to both people linked (to prove they’re not converted) is ridiculous and incredibly overpowered.
I don’t like the mechanic of talking to the dead in general as it punishes good/sneaky plays (especially for neutral killers) but that seems like a discussion for a different topic.