First I will say that the game look really promising, and that i look forward to the day it is ready
1 Alien bug launcher: fire a little bug who when the hit go into melee and bite the target. If they not hit (or the target is dead ) they walking around and attack the nearest enemy, they are hard to hit but easy to kill
2 A repair set so you can repair your vehicle under a mission, the same way as a medic kits
3 Under a night mission an vehicle can have light in the front that you can turn on and off. (This can be use full because a vehicle can not throw flare to see in the dark)
4 a stun grenade, but it dos not work on all kind of aliens, but later you can build a better one special against the aliens that do work on all aliens
5 pilots to the airplanes, as like soldiers also can get some XP from shot down UFO and then give a small bonus to hit and avoid hits (perhaps +0% to +10 %) to the craft they are onboard, but not so advance as the soldiers, this will also do so people think a little more about their planes