Cardboard cutout camera
The cardboard cutout item works as a camera from the head portion of the cutout.
My idea is balanced because:
+Extra pair of eyes for the user
+Punishes offenders who rush and don't play tactically
=User will likely only get one use out of it before it's disabled
-It's immobile
-Can't be angled vertically (to look up/down at a particular location)
-Cardboard cutouts are very obvious to offenders and punishes the user if they don't use it in a tactical manner (offenders can just crawl past it undetected if it's too obvious)
-Easy to disable (from a distance with bullets or point-blank by traditional disabling)
Hope this sprouts some ideas for game development!