Yeah, allow me to add the the chorus of "That shit's way too expensive for normal corpsec to have."
A level 1 PI-Tac is nearly useless, since the only thing it does that commlinks can't do is a +1 to Perception and a GPS location system. The rest can be done already. Any imaging device can share its readout wirelessly already. Unless Team Biomonitor somehow doesn't require actual biomonitors (implying the PI-Tac adds hardware to everything slaved to it somehow) then that's doable simply by virtue of having biomonitors, which all runners and corpsec should have. Weapon status indicator, again all weapons do that already. Combined with it needing to be bought again for every 6 guards on duty, no company would be willing to pay for that crap.
Level 2 has much better benefits; however it is way too expensive for anything but military or HTR in my opinion.
Level 3 makes me laugh. That stupid "remote and limited access to vehicles and drones". Guys... You realize that you can just give other people three marks? Or just one mark if all you want them to be able to do is "[give] simple commands such as 'go to this location' and 'attack this target'"? That does not count as extra functionality! That is like advertising that your DVD has interactive menus as a bonus feature!
As for information sharing, there's no real reason for the corpsec to not be set up to flip an alert as soon as they detect something. Simple Action, Send Message, "I think I see someone." If you knock them out before that, their Biomonitor (which may as well be broadcasting to other guards or even the Host, not a huge point in having one if you're not using it wirelessly) will tell everyone they were injured. It's the information age right now in real life. This is why a hacker is needed; they can prevent that guard from sending a message or edit the readout of their biomonitor (but that'd only work for a short time).