I feel like Wayfinders are supposed to be an icon item in pathfinder (given that they are, "A badge of office for agents of the Pathfinder
Society.") They also interact with Ioun stones which have a long history in the game.
Given that I'm surprised there isn't both more crunch (more traits, some spells, more types of wayfinders, other items that work with them) and more fluff (Reverse-engineered from half-understood ancient Azlanti artifacts....tell me more) around them.
More new types at least and maybe a price for a basic (only casts light) version with two ioun slots).
Has anyone heard of something in the works that expands on wayfinders?
Given that some people already think their Ioun boosting capability borders on overpowered, I'm not surprised that they aren't improved even further or talked about more.
The Pathfinder Society Field Guide also expands on some more variant Wayfinders although some of the rules crunch in there wouldn't make much sense unless you're already familiar with the faction mechanics and how they're used.