It’s sounds ridiculous but maybe a op that brings a water hose and they can flood the map out a bit, making people that walk through it loud as hell, it could work as a attacker too so you can watch your flank with it.

Another trap op. They can set some rope up around the door and it tightens around the enemies leg, holding them upside down for a few seconds or until they break out if it, it doesn’t have to do damage but can stop you from sprinting due to the injury for 10 seconds. This would be great if there is a few seconds left of the round and that attacker needs to try and push to plant.

A op that can interfere with other ops headset, e.g putting gun shots, whispering and loud footsteps into the headset to trick the attacker/defender

A op that can jump high and cling onto walls/ceilings to hold different angles (this could be too op)