Some things i'd like to see:
Ability to lock down a vehicle to stop people spawning in it. This is one thing that massively gets on my **** especially when i'm in a tank. More often than not i get someone presumably with adhd in the machine gunner seat constantly firing at absolutely nothing. WHY?? It's an annoyance and in some cases gets me destroyed especially if i've dumped smoke cannisters to try and beat a retreat and the muppet in the mg seat is still firing at nothing which gives the enemies a target to hit me through the smoke via the muzzle flash and tracers. It used to be in these games if a gunner was firing his gun he was actually firing at something and you took notice of it, now you barely take any notice because more often than not they're firing for the sake of firing.
Get rid of these sad, gimmicky movement mechanics. BFV has some utterly retarded looking little knee slide system which a lot of people are of the opinion messes with the hit detection, in some instances it also seems to speed up movement. Apparently during the course of ww2 the battlefield was made exclusively of highly polished surfaces that let soldiers slide along on. What the hell is the point of this? Besides looking utterly stupid and leading to some questionable hit detection.
Do we really need all these uninterruptible animations that make you temporarily lose control of your character while it plays out? Squad revive and medic revive being 2 obvious ones. Then you have animations for getting in and out of vehicles, ejecting from aircraft etc. I get they're trying to add a bit of realism to some areas but it just slows the game down and adds situations where you're vulnerable to enemy fire and it's not as if you can cancel out of the animation either, once you hit the button you have to see how it plays out, which again is just taking control away from the player.