Yeah.That's the mode from the batman games? Yeah...that totally killed any tension in asylum for me. Is it in city too?
My big problem with it is that it encouraged you to stay in that mode at all times. The Tomb Raider approach was alright because you had to stand still to use it.
GZ is a better approach than both batman and TR because It's really only good for situational awareness, much like the Soliton Radar was but without all the environmental detail that the Soliton Radar had. You are aware of the enemy presence only after you manually spot them and the approach towards your objective is still up to you to figure out.