For someone who's already played through the game it'd be pretty nice if there was a mod that enables the effect of the 3 sunglasses in the game without actually wearing them:
Classic Sunglasses (detect life)
Modern Sunglasses (detect machines)
Sunglasses (detect loot)
Maybe even make hotkeys for the effects to toggle them on or off at any time.
As a New Game+ mechanic it'd be ideal but I guess the devteam wasn't thinking that far ahead.