The perk is fine not op or weak it is totally fine but I think it shouldn't apply the player who is just unhooked because the unhooked person have no idea where killer is also injured and killer knows where you are, you just got unhooked you are leaving blood pools screaming and scarthes etc. you can be found easily.

I think effect should start 20 secs after the person unhooked. Tunnel by itself is a rough thing for survivors making it stronger with a perk is just killing the fun part of the game.No matter what the situation is game should encourge killers to play as fair as possible. Btw it is being a tactic doesn't mean it should be approved.