M32A1 40mm Grenade Launcher
Trip Wire
Laser Trip Wire Alarm
UAV/UCAV support from higher
Parabolic Dish/Microphone (Listening)
Motion detectors
Melee weapons found in Martial arts studios. My children train in Kempo and they can use the bo staff and kamas pretty well. They have some experience in Nunchuku and some of the kids in the school are trained in the use of the Katana.
We're definitely going to be implementing a few grenade launchers, so you can expect those.
As for trip wires and laser trip wires, that sort of equipment has a setup time which could be detrimental to an operation in which you are better off moving quickly. If you have any sort of trap or sensor, it will have to be something which can be simply placed on the ground and activated.
The UAV/UCAV is something which will be generally out of the hands of the Operatives, but they will most likely serve a purpose in the missions that allow their presence.
You're in luck for a microphone which can be used to hear audio from a fair distance away. Foxhound Operatives will have a standard issue Int-scope which will end up with that same ability.
Motion detectors are a good idea and I'm sure something similar will become available at some stage.
Now, with melee weapons. I'm sure you know what I mean when I say that carrying around extra melee weapons could be more of a hindrance to someone attempting to be stealthy than a help. Ideally they will only ever need their knife or their bare hands in order to take someone down, and those can be used in almost any environment without having to worry about them bumping around. Now if you were to take such a weapon into a combat oriented mission, then the usage of specific melee weapons is more acceptable. Of course, your character would need to be of the mindset that they will actually make usage of their chosen weapon in the middle of what will most likely be a gunfight.
So I'd say that an operative sneaking around and donking guards' helmets with a bo staff isn't advisable, but if they
truly wish to step into combat with it, then they can. It just comes with all the risks of using a melee weapon in an environment filled with enemies wearing body armor while carrying shotguns and rifles.
Cheers.