@Trokey66 As I said before, I feel that the problem is that they have brought effective ranges down on all weapons to SMG territory. We have huge maps, but effective range of even sniper rifles starts to drop at 150 m. Instead of bringing everything down to the lowest common denominator, stretch things out and make weapons effective at different ranges and for different tasks.
Currently the only real difference between LMGs, Rifles and SMGs seems to be magazine size and recoil/spread. The game mechanics seem to be that SMGs have a lower caliber round, and therefore do not recoil as much, so are much more accurate on full auto. While that is to a degree true, past 100 to 150 m, accuracy should be poor (even on semi). Assault rifles should be able to reach out much further, but take a bigger accuracy hit if the trigger is held down for more than a short burst. LMGs are designd to lay down fire, but not necessarily be accurate (suppressive fire on an area). Snipers and DMRs are semi or bolt action, and designed to reach out more accurately, but penalise them by making them slow to aim and extremely inaccurate while moving, with accuracy improving as you stand, kneel and go prone.
The current nerf/balance models seem to concentrate on close range combat and just bring everything down (which essentially ends up creating the no real difference you mention). Make different weapons effective at different ranges for different purposes and you have to make a decision in a loadout. Keep nerfing everything for use in a tight CQB box and everyone just moves from one meta to the next as the nerfs appear (Just like COD).