We actually discussed this idea on staff, on multiple occasions. I think Johnny and I had discussed basically exactly this a couple years ago.
I'm not opposed to the idea, but I do think that it won't actually solve the problem. It may make the lives of a couple people easier, but in general, everyone should just remember to set their @look_place when they move. It takes awhile, and everyone forgets, but it's usually harmless.
If you gleam some IC info through someones obviously outdated @look_place, you should not get meta with it and should play on as if you didn't know.
I do think one iteration of this that we came up (Johnny's idea, I can't take credit) was to have @look_place stay the same. So you would do:
@Look_place me is cutting through the mix like a ghost, all armor and swords and grenades. A wooden bokken is clutched in her bloody left hand.
HOWEVER, you could then override it with @temp_lookplace which would auto-clear when you leave the room, reverting you back to whatever you regular @Look_place is.
So, an example of @temp_lookplace:
@temp_lookplace me is leaning against the bar, chatting up Rychek.
^ See what I mean?