HS1/2, EM3 and Mobility Sling make it a very versatile weapon. EM3 is great for tap firing and range, Mobility Sling allows you to move almost as well as an Ntec while moving, and HS1/2 still gives you plenty of non-ADSing capability
Just because there are cheaters doesn't mean there are as many as people want to believe. It's much easier to blame cheats when you're getting destroyed than it is to just admit the other player is better than you.
If every hackusation was accurate than many, many people I know would have been banned hundreds of times over.
Seems like there are more pressing matters at hand. Fixing this would probably end up making the controls more clunky and sluggish, which I think would be a major disappointment for many.