the MAV's from BF3 are borderline useless especially with the crossbow's scan tip making the TUGS useless. I would rather have a active scanner built into the UGV variant, and a line of sight for the UAV variants.PLus, there has to be some kind of combat variant, being slower, and having more armor, it could be used to check a area before you move. Just using a spy version would only help stealthy people, and right now, that's very, VERY, VERY hard to do right now.

in my opinion it should be like the MAV off of BF because im pretty sure the drones arent very big

I did actually read on the drones you had posted, and honestly the UVAC sounds a lot like BF3's MAV, because you can "spot" people using the MAV which gives out their locations to your squad. If we're talking about just passive reconnaissance, then the scanning drone could simply pick out enemies the same way they're picked out by aiming at them. But that seems kind of superfluous in my opinion. So I say the drone's scanning should be increased somehow: maybe making every enemy on the drone's screen light up like a christmas tree, perhaps even having an outline of them appearing through walls or other barriers? I think that would make the drone's scanning quite useful, even if there were no armaments for it. And the one piloting the drone could receive a point bonus for every enemy killed that they had highlighted. I think this would make the drone very useful for coordinating things like precision strikes or orbital bombardments.

As for the ground drone, this, I think, could be useful, but the EOD bot in Battlefield is notoriously difficult to control. Aiming a gun with it would be hard. And honestly, the vehicle controls in this game make me a lot less inclined to drive one of them around than I otherwise would be, despite the awesomeness of drones themselves.

In addition to these two types I would also like to submit two more.

The first would be airborne, but much bigger, I think, than the simple scanning drone. I think we should separate the scanning drone from the combat aerial drone, both to avoid the one drone becoming OP and to give drone users a sense of choice, that they can decide which kind of drone they want to use without having to be restricted to only one air type. So this drone would have the same scanning capacity to a regular dropsuit, but would be able to fly around and engage ground targets. It could call down guided rockets, perhaps from the MCC, or use some sort of mounted blaster or mass driver. In my mind I see it as the tactician's drone from Killzone 3, which was controlled by AI, but I think allowing it to be remote-controlled is also viable.

The second kind of drone is a personal-defense type, also featured in Killzone 3 and used by the medic class. The personal defense drone was AI, and followed the medic about, opening fire on any enemies that came within range with a ninigun attached to its underbelly. The drone was very fragile, but was loyal almost to a fault, sticking with the medic while he bled out on the floor. I think this would be a very useful add-on for logi-users, perhaps even dropsuit-specific to them. The drone would follow the logi around, providing a bit of backup and extra firepower in lieu of protective squadmates. Improved versions of the drone could even fix the logi's armor or provide temporary shield hardening, or maybe even inject nanites to its downed master.