I've used LMG as main weapon since BF started. It's the hardest to use and you never master it because of recoil, but I thought it always had bullet spread because when you shoot against a building wall, the spread is pretty bad and always has been this way because its an LMG, not an assault rifle.
It's why you can't run and gun, you can't toggle ADS frequently and for some of the guns, the reload takes a long, long, time.
Last week I tried assault and was shocked at how easy it was to kill. The TTK was incredibly quick, like an arcade game. With assault it took 2-3 rounds to kill, while on LMG it took more than half a dozen.
If you are frustrated with assault weapons, try LMG. The TTK is double what assault is, you have massive recoil along with bullet spread, and god help you if you have to reload or ADS when moving in a firefight.
The only reason I main LMG is because I can hold the flank on an objective and I love the big sound of the guns.
I don't get many kills, and its so very frustrating to use, but when I can draw the attention of an enemy squad, then I'm doing my part, even though my K/D sucks.
So, bullet spread, I don't know how I feel about it since the LMG is already pretty bad.