That your aim with SG and MG at short distances got worse is certainly the placebo effect, as the shot antilagging is handled the very same way as before. If this is at all antilag related, the nex would not hit either. Some even say the rifle does not have this problem, which proves this is placebo as rifle and MG use the exact same code.
And ballistics by default only change the path of the bullet, not the time. And that does not matter at all at short distance.
Stop spreading lies all the time. Someone started it, and people start believing it even though it makes NO SENSE AT ALL.