Here is a simple thing i think you should be able to do with a medical/support(ammo) drone.

If for example you and a squad mate are both taking fire and he she needs a repair/or ammo but your separated and you cant run to him/her because if you step into the open you'll be gunned down. Then you should be able to target him using your neo-com(the computer strapped to your left arm not the menu) toss the drone in the air or place it on the ground like a little spider drone and off it goes over to your squad mate without the risk of you dying. then when it's done it returns.

Heck i just thought of something. what if you had a little hacker drone? for those moments where your at an installation by yourself because your squad mates where killed off or you were the lone guy that made it through the defensive line. you could run up to the installation attach the drone to the HUD and then continue to hack defend the area while it hacks away. Many of us find it annoying when were hacking and start getting bullets or elbows to the back of the head. This would at least give you a better chance of surviving the 5-6 guys that start running towards you to try to stop you once they realize your hacking.