Will sentry turrets now be using these new field of view cones (frustums) to acquire and fire upon their targets (eliminating wasted ammo and the tell-tale sign a turret is nearby)?
Also, concerning mob hearing, what happens when a mob reacts to multiple sound sources? Do certain sounds have priority over others? Could they be distracted by, say, an arrow landing nearby if they didn't hear or see the shooter?
Stealth/espionage games are really fun to me, so seeing these new additions is very exciting!