Add new game modes like TDM and capture the flag.
Add new maps.
Add clans that can clan war other clans witch will get more rewards or something.
Add a global chat so all players can talk to each other while not in game.
Make it so you can click on some ones name and add them as a friend on steam.
When you click on some ones name show all of there player statistics like their kill/death ratio.
Add in game leaderboards for the best players of DirtyBomb (like most kills, best kdr, best clan)
These are just some of my thoughts thank you for reading 