I think an Attack Operator with an alarm system that they could put down that once triggered gives an audio queue would be dope...If there was an operator like how @GoldenGlove suggests... it would actually be cool if he could deploy a The Division style grean rappel rope that shoots upwards.
As a defender, it would be amazing.
As an attacker, some type of anti-flank device would be great. A proximity stun that places someone in a DBNO but thatnmay break the game as defender don't have something to destroy electronics.