so Marco i have 5 features you should add to the classes
1 make it so the officer class can give orders to team mates like attack or move or defend or even take cover
2 make it so the medic class can heal team mates and his self and your team mates should be able to call for medic and even the player can to if they need healing
3 make it so the engineer class can repair damaged vehicles like tanks and trucks or even boats
4 make it so the radio man class can call in air streaks to kill enemy infantry and tanks also when you do call in the sir streak a bomber plane flys over where you wanted the air streak and then the plane drops the bomb
5 make it so the sniper class has smoke grenades this could be use full because you can make it so that when your in the smoke the enemys don,t shoot at you because they can,t see you and this could be good to get in to a good sniping shot with out dying trying to get there and if the other types of classes wanna use the smoke grenade they have to loot a snipers body
and there you have it Marco these ideas can work for some good team play hope to see most of these in your game Marco