Idea: Give the Detective something that gives them access to the Security HUD at the start of the round. My first choice for the implementation of this would be to implement a HUD effect into their Noir glasses, but it would also be alright to just give them HUDglasses in their cabinet or something along those lines.
Why: Detectives already have access to the security console, and can head up to equipment storage to ask a fellow department member for HUDglasses nine times out of ten. I love the Noir glasses effect but personally find myself asking for the HUD at the start of every shift, as they are strictly better. In Code Red situations, having that instant information can make all the difference between catching the criminal and getting robusted yourself.
Coding Difficulty: Easy, this would only require placing an item or at most tweaking an already existing item.
Scope: Very small, quality of life.
Balance: Given that the Detective already has access to everything that the HUD provides, this doesn't make any significant difference beyond saving them a minute or two at the start of the round.