I like the idea... but this has to be balanced a bit better. Got to agree that it removes an interesting aspect in some levels, especially late caves
An idea, for example, could be to explore automatically all tiles the player could reach without walking in dangerous fluid... ofc, still a light issue with health or powerup decay, but the significant gameplay improvement would be worth it, imo.
Also, I'd like somethink like int3, to reveal useful items on a floor (e.g. all exotics, uniques, and activable items... I mainly tough of this for Ao100+ games) Or maybe, exotic & mods sense could be bundled with scavenger... ?