I barely know french so I'm not even going to try to answer you in that language just for your reading's sake sorry

(I'm Portuguese btw : D)
I'll start by the ones that have already been discussed before
The vehicles will be added, however they are not on the top of the dev's priority list. Jeeps and tanks are what I believe he'll implement when he does.
Pasik is aware that the AI should indeed be more agressive and he will, also I'll actually take this change to add something.
Have the AI patrol the HOLE base, not just the areas where they'd have a frontal attack, one can easily sneak behind the area, get into a good cover and kill them all
Pasik will not add classes, instead he'll have various weapons (or kits) to have the player choose what he actually wants to be, for example, right now you can pickup an MP5SD and perform sthealth opperations more easily.
Now for the rest
The stamina and hunger i don't really know, I would't want that in my opinion, it makes the game, too realistic but the wheather now that
MUST be implemented XD
and I believe that various languages for the game wouldn't hurt.
Glad our community is growing.