Heres what i think that should be added: 
Gameplay: 
Unconscious system, so if you crash you wont die you go unconscious for a while and maybe hang in the chair or something then wake for a bit. 
Also, make it so you dont just die from helicopter crashes all the time, it would be better, and more fun if you got unconscious not die. 
Game Engine: 
Now here's a thing that would make the game have alot me people buy it and play it and it would make the game better/funner, Soft Vehicle Body Physics (or hard or whatever) then crashing and also aircraft crash's would be alot more realistic. 
---------- Post added at 06:05 ---------- Previous post was at 06:00 ---------- 
 
Well, thermal is partly meant for detecting snipers (i think) and i guess i sorta agree with the flashlights,