I have a couple questions about perception. Has the range at which you get NPC markers been reduced? What exactly are bonuses/penalties for having high/low perception. I've read that it's something about critical chance but would love to get some numbers to know exactly what I'm getting.
The range that you detect enemies factors in your perspecption skill, but it also runs through the detection formulas, so it's a bit tricky to pin down how exactly it works . . . plus the GECK formula for detection isn't terribly accruate.
Currently, perception influences your ability to detect enemies (i.e. the radar), it's associated skills, and there is a critical hit chance bonus. I don't have the numbers in front of me though to say what the bonus is. In FWE 5.0, perception will also influences the range factor for VATS hit% calculations . . . so as your perception increases, raneg matters less and less in VATS.