Sounds: Well i think the originial Wolf Et weapon sounds would be nice as i think they are much better than the other, moreover a soundpack could further make the server better.
Maps: could you put into consideration the adding of more maps ex: Fuel dump, Hawaii, battery, Venice, marakech streets, baserace <if you already don't have>, subway, tankbuster and mad bunker.
I'm not asking for all the maps to be added but for the array of maps to be widened, these are just some of my favourites.