After reading all 30 pages (dear god) i've read some good and not so good suggestions, which i won't discuss except one.
But here are mine and some are already mentioned or are rather obvious
No crosshair (:lol
No obituaries (but i would like to see who killed me!)
A limit in classes (no need for 30 medics and snipers)
No firing while jumping and diving
A animation when moving while prone (hope you understand what i mean)
Blood and gore and pain screams (maybe see a track of blood on the ground)
More (Realistic) gametypes (kill the commander/secure the bridge for xx min etc.etc.etc.) - i think to many objectives will make the game chaotic and unrealistic.
Hit effects (When shot in the leg you fall on the ground screaming out of agony :lol

- when hurt you can only be fixed by a medic and if there is no medic you should be able to commit suicide (instead of lying on the ground for 30 min)
Stamina fix - should take much longer till stamina is refilled than it is now.
Weapon sway + realistic recoil (when stamina is low sway should be increased)
Fall damage increased
Revive from the dead (dont know how to make it realistic but if this stays you should only be able to return from the dead once.)
Scan (without seeing enemy infantry - I think this will be better for gameplay)
Artillery time increased before you can fire again
Remove the possibilty to put artillery strikes on spawns. (pretty lame imo)
Hold breath with sniper rifle (so weapon sway will be gone for a short period of time)
Binoculars (only Squad leader and Commander (?)
Damage if you get out of a moving vehicle
Delay of time when switching positions in vehicles
Parachute (only to be used once, i don't think basejumping is very common in a war)
Jump adjustment (i think you can jump to high now)
Iron sight adjustment (remove the zoom)
Respawn at base if you are not in a squad (to encourage squad play)
Only assault weapons for rambos (to encourage squad play)
Mec models -> towel guys
Booby traps (?) (special class only)
Movementum (you accelerate when you move - this is to get rid of pee pee dancers)
Poison gas (not sure about this one)
Weapon bobbing while moving
An option to limit classes and all vehicles (server side)
Adjustable respawn times for vehicles (server side)
Leaning (i prefer only looking, but with weapon the accuracy and sway should be increased)
An option for toggle crouch
About the respawn suggestions;
I think the way it is now is pretty good, though the time should be increased (1 min or so), i would like to play with my team instead of searching for your opponent alone, while everybody who died disconnects)
But this could be an server side option.
English is not my native language so some things might be unclear (my apologies)