I've been thinking about some simple improvements at server chat screen. Maybe they aren't so necessary, but they could affect on new players as well as on others. I'm not sure why there weren't any changes at that place of game for long time - I think its because development team wanted to improve Battlescape part of game firstly or there are difficulties with making changes there. Anyway, discussion about them might be interesting, even if they won't be implemented.
1. Clock - DateTime field placed in the corner of screen, where current server time and date would be displayed. Players would use it to arrange matches (useful for players from diffent time zones). It might be also useful in the future, if some kind of Geoscape would be in the game. I think it is trivial to make a clock for developers

2. Chat messages (e.g. from last 24H) visible all the time in chat screen - new players would see that there is traffic in game. Also all players could write something like 'I will be here ready to play at 07:00 AM', then other could read it after few hours and play with that player - this may also be helpful at making tournaments and increasing amount of matches. I think this solution require some kind of file on the server, where those messages would be stored(maybe already there is that kind of file on server for current type of messages).
3. Statistics from server status page(players, games, maps,etc.) avaliable directly from game (e.g.in extra screen)- people would have easy way to see them, talk about them and improve them - when you know you have bad score you would try to change it and when you know you have good score you are happy and want to play more. Statistics also could include more tables,charts,etc. in the future.
I realise that those things aren't milestones but I think it would be good start to implement them in the game.
I can place here few more ideas but firstly try those ones.