I am personally a fan of them as they remove the hassle of untangling wires when you want to listen to music. They are terrible for any kind of physical activities and if you were thinking about that then get some power beats. In terms of audio quality they are exactly the same as the normal...
You can just play on Altis because that’s what the server runs on. You won’t be sent the mission file because that’s one of the many factors that makes the server unique. The buildings are on the same places as on default Altis 😀 @Javier
Well the EU passed it, will still be two years from now until it gets implemented and from looking at it, it is a copyright rule which will mainly hold companies who allow users to edit content / post it reliable for copyright issues. So I highly doubt it will effect RPUK as I doubt they are...
From what you've said it looks like to me like an issue with your profiles. One way to fix this is to delete your 'Arma 3' folder and 'Arma 3 - Other Profiles ' from your documents directory. I would advise you back up your current Arma 3 profile file which has the extension of '.Arma3Profile'...