I like using it because I have trouble seeing things amongst the dead bodies. Things like that should appear with the ALT key as a standard body search. And I use it with the keys because I can. I think some quests could be more interesting if the keys were kept somewhere interesting. A lot of the houses simply hide the key in or under something near the door. It would only take a few seconds to do a quick scan of the place. Something like the Dr. Elrath quest could have the key fall out of his pocket as he storms out of the house. If you see it happen, you can then float the cursor over it and pick it up, but it should be an observation thing.
