Sometimes I want to create a small object with my missions, but people who don't have the addon will not have the ability to play it, because they don't have the addon downloaded and installed.
I would like a feature where I could compile mission files into a .PBO with an "Addons" folder inside of it. This way when someone joins a Multiplayer game, they don't need to find the addon to play the mission - it will automatically download for them.
Another solution would be a way for ArmA 3 to connect to an addon-hosting website, where the game asks "This mod requires addons, would you like to download?"
Or even automatically connect to the Steam Workshop, download and install the addon without needing to exit the game.