While technically not purely a highsec issue, please remind your CSM colleagues and CCP about this chart from the second CSM 11 summit:
The removal of the watch list, and the recent chat changes which removed the last work-around to tell if someone is online, have made locator agents much less useful, and you can see above, much less used. The core of the problem is even active players are logged off most hours of the day, and with no way to tell when a target is online, you spend most of your time chasing the ghosts of inactive players.
This affects all hunters who used this mechanic, but mercenary groups prosecuting targeted wars were hit hard and it has been argued this contributed to the shift towards blanket wardecs and hub camping.
Regardless of this claim, i can unequivocally state is much more tedious to track down someone in the game without the ability to get even a sense if they are online or when last active. I know CCP is generally looking for issues rather than solutions, but I will suggest that even a simple online/offline indication with a locator search, or indication of last activity in the flavoring text from the agent would go a long way to restoring the utility of the mechanic.
Best of luck on your new endeavour.