This is a small two part suggestion I came up with while playing yesterday.
1) Disable the ability to shoot when being a passenger in a tank.
The last patch removed the ability to shoot weapons or do anything than sit still while riding cars and trucks. However, you can still shoot while riding tanks. Yesterday on Ramelle, the enemy Tiger had constantly two guys sitting in the back repairing him constantly. This made destroying the Tiger pretty much impossible.
Of course we could have just shot the guys repairing him but for some reason, at least according to my observations, shooting people who are riding a tank is extremely difficult even though they are sitting perfectly still. The shots don't always seem to register properly. Also, killing people walking behind the tank is easier.
So, either remove the ability to shoot while riding a tank as a passenger or bring the ability back to all vehicles.
2) Using a gun as a melee weapon
I know there has been similar suggestions before but this is a little bit different from the others. I'm not asking to be able to swing my gun quickly against an opponent who rushes around the corner as it is impossible in the engine.
There are some pick-up kits that have no melee weapon at all (mainly sniper kits, the German G43 kit which has only the rifle and grenades) which makes close combat very awkward. I rather stab my enemy rather than shoot them when in close combat and I feel very silly just running around in circles just to reload my rifle and avoid being stabbed by my enemy (happened to me about 3 times yesterday on Goodwood with the G43 kit). So give these kits a melee slot with a simple (well, "simple") animation where you hit the enemy with the butt of your rifle.
Or give them knives, which would be an easier implementation.