The problem is that frame of reference. I could say that such a station is oriented so that the entry point is pointing to Galactic North.
No, you misunderstood. This is not about the stations. As you said, that would be useless (and there is already a mechanism in place to find out the orientation, through its rotation).
This is about sharing directions between pilots that are in the same place. Flying together, but not in formation (because then directions are trivial). So any frame of reference will do: galactic, system or planetary. But we need an orientation that every pilot in the group can understand, no matter which way they are flying.
To give an example, imagine a group of friends in the "federation distress signal" scenario. There is currently no way to cooperate, to say things like "I take the eagle at ...", or "I'm in trouble, come help me, I'm at ...".
This would apply to many scenarios, such as searching a wreckage, an ambush in a field of asteroids, coordinating an attack on an enemy fleet, and so on...
Note that, as I've said above, this could also be achieved by having a way to set a "ping" on the radar that others in your group could see.
The point is, IMHO we need some way to share this kind of information.