'That's not true. Only 2 bullets to kill up to 20 metres. 1 burst range goes to about 40 metres without a headshot required. The MSBS is also extremely accurate and very easy to use. Of course nobody wants it nerfed but it should be expected. Even if the accuracy is toned down a bit, it will still be a great weapon.
Yea, the MSBS is the burst AR. It's definitely going to be the most dominant AR in the game unless it gets changed. Reminds me of the M16 from CoD4 (which had virtually no recoil, unlike the MSBS). The damage on that, too, was also discussed ad nauseum in the CoD4 forums.
Overall, I like the MSBS, but it does have its own strengths and weaknesses just like every other gun.