Gloom Walker : Raise the H/MS bonus to +4/4 or modify the light sensitivity for surface races to not include blindness for its effects. Light sensitivity is a huge penalty for only a +2 bonus, giving -2 ab and penalties to saves whenever you're in the sun + a chance of blindness each turn. +2/2 hardly justifies light sensitivity the way it is now.
Light sensitivity is what it is! I don't think it should be changed for any race. The idea of being a gloom walker is that you hate sunlight and avoid it at all costs. -2 ab and saving throws will make you do this! (also you gain an additional -2 to all saves and ab when you fail the fort save! Fun!)
I feel the perks aren't meant to be that mechanically powerful, and some people I feel think otherwise, but they are little tidbits of differentiation and variation between your characters to make them feel more unique.
Effects of light sensitivity should be listed for this perk.
Yep. Because also tagging a Gloom Walker with Light at night would do them a whole lot of pain too. Even more than lighting up a stealther is normally a Screw You.IMO, keep it as it is but add that it gives you Low-Light Vision too, as that would make a lot of sense. Nobody's forcing you to take it, and it is meant to be a real "night person" or "Underdark refugee" perk. It is a total tribute to Night Person in Fallout :D. Low-Light vision or Darkvision would let you be comfortable in the darkness and add extra "Put out that damned light, it's blinding me" flavour.