This is what I have learned:
The PoLR is the point of (un)balance. A tipping point.
The person is sensitive towards the information but doesn' really know what to do with it.
The stumbling happens not just because it's weak, but because the person is somehow ambivalent towards the information.
Usually the person tries to either ignore the PoLR or he tries to integrate it into the information flow.
Fi and Fe PoLR can create a subjective feedback. ILEs adjust their ideas and thinking under influence of Fi, for example morality. But it depends on the person what it actually is.
SLE can have an emphasized ethics of actions.
Fe PoLR in ILI seems to have something to do with their critical attitude.
Anyway, the information is not irrelevant. It's like a ghost lurking behind the scenes.