I'd say it's just fine as a mod, but looking at how few servers actually run ACRE and how it requires teamspeak... YES!
upvoted

Upvoted! It's frustrating to engage an unaware group of enemies on medium/long range and after your first shot falls they just turn right around and kill you within 2-3 shots.

I think it would be a nice feature, low priority after fixes and many other features, but it would be nice for things like civilians, modding, ...

This should be made similar to how it was done in Red Orchestra 1, if the weapon is close to another surface (also sideways; walls or windowframes,...) a little symbol would show up indicating that the weapon is rested together with a huge accuracy buff