Well the current stamina system has so big penalty for running weapon raised so at least that already makes me not to keep weapon up until I'm in combat.

That's why there is a raise/lower weapon function in the game. The people should start to maintain discipline, that is the problem on most of the public servers.

I rather have animations sync. If the player has their gun up, other players should see their gun up.

Maybe I should specify, that the weapon should not be completely lowered (as with using the weapon lower function), but just slightly lowered so that it would not be pointed directly at whatever the player is looking at.

If I where to have to raise and lower my weapon manually to look at my teammates it would become tiresome and the clunky nature of raising and lowering your weapon (especially when crouched) could get you killed.

Your gun is still "up" just not aimed directly until either fired or aimed down the sights.

It's just a small feature that could make a big difference in terms of immersion.

The problem here is that 1st person view doesnt match 3rd person. Current 3d person shows player aiming down sights at all times even if he is hip firing. Bringing weapon chest level when not in ADS, just like 1st person shows, in 3rd person would already make it less hostile and more distinguishable for an observer.

ArmA should had this sorted a looong time ago , to recognize someone that he is firing from the hip or aiming down sights

Hell even TF2 sniper has that , you can easy see if he is aiming or not

I think the different views points should ideally display the weapon in the true position always.