Few additionl features for the infantry and emplacements (rotatable emplacements, ladders, mines)
I would like some features of the game developed a bit further, so most of these wouldn't require very big changes.
1)At least the lightest emplacements should rotate freely. There should be an easy way to rotate other emplacements 90 degrees without the cost of dismantling and rebuilding. It should just take some time. This would make some emplacements, like the SPG-9, somewhat more useful.
2)Combat engineer/Raider/"breacher" should be able to place ladders.
3)It would be nice to have some "random" sandbags over the long hasco walls of some maps, like Tallil. It would make it safer to shoot from a hasco's cover without being spotted too easily. Obviously this crenellation should be built in on the map, not just placed by a player.
4)I would be nice to have anti personnel mines for the combat engineer. Maybe POMZ-type mines for the irregular forces and command detonated claymores (or similar directional devices) for the other forces. The POMZ should have a 10m long tripwire, the claymore should have a 50m detonation command range.