This is a minor complaint compared to most of what people have been talking about but I haven't seen anyone else talk about this before.
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APPARITION SENSE FEAT 1
You can see and interact with things others can’t. You have
apparition sight, an imprecise sense that allows you to
detect the presence of invisible or hidden spirits, haunts, and
undead within 30 feet of you.
Imprecise Senses
Hearing is an imprecise sense—it cannot detect the full range of detail that a precise sense can. You can usually sense a creature automatically with an imprecise sense, but it has the hidden condition instead of the observed condition. It might be undetected by you if it’s using Stealth or is in an environment that distorts the sense, such as a noisy room in the case of hearing. In those cases, you have to use the Seek basic action to detect the creature. At best, an imprecise sense can be used to make an undetected creature (or one you didn’t even know was there) merely hidden—it can’t make the creature observed.
Hidden
While you're hidden from a creature, that creature knows the space you're in but can't tell precisely where you are. You typically become hidden by using Stealth to Hide. When Seeking a creature using only imprecise senses, it remains hidden, rather than observed. A creature you're hidden from is flat-footed to you, and it must succeed at a DC 11 flat check when targeting you with an attack, spell, or other effect or it fails to affect you. Area effects aren't subject to this flat check.
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After a quick look at the rules, this reads to me less as "I see dead people..." and more "I can sense something spooky is nearby" which feels counterproductive to the idea of the ability being presented.
I think the ability should be changed to a precise sense rather than an imprecise one. While I can understand the restriction on other similiar abilities such as the Bard's Soulsight, I don't think its unreasonable that a class whose whole thing is their ability to perceive, communicate and bond with spiritual beings that are beyond regular peoples' perception shouldn't have any difficulties when it comes to perceiving said entities.