In ARMA II you've been able to see particular server version in compare to your version of the game and recognized expansions running on the server.
It would be kind of useful to have this option in ARMA III (it is partly there, I know) in this way:
4 fields under the server list. First two for server:
1] field with server version (number red if the version is not compatible with your version)
2] field with recognized expansions on the selected server (red name of expansion if the same expansion is not on your computer installed)
under them, for simple comparation the same for player client:
3] field with player version of the game (yellow if higher than server version)
4] field with recognized expansions running on player game client (yellow if the expansion is not on the selected server)