1- There is "keyboard presets" that you can use. Create your own for now, but I think they'll probably add some like CoD or BF.

2- Introducing "combat mode/stance" as in Arma 3 would be the solution.

3- There's nothing to change here... ballistic is pretty good.

4- Stances and being able to move the head are key features in the Arma world IMO, it helps you to lower your visual signature to the enemies... even play dead ;).
Just don't use them.

5- This point is pretty unsignificant IMO, I'm sure they do the possible to get the most realistic rendering as possible. It's a balance between graphics and performance.

Hello EricR.
In the case of point 2)
Look into Field Manual in ingame Pause Menu. You may find there hints about stances and poses in Topic Controls.
New update/release should bring Field Manual into Main Menu screen.

Hello Vietwitch,

I may confused myself, and I was referring to the "Combat Pace (2xC)".
I thought that it let the weapon raised while running.

Sorry for the confusion and thank you,
Eric R.