First things first: just because the game doesn't get the changes YOU think it needs the MOMENT you think it needs them, doesn't mean the problem is ignored.
Secondly they probably aren't all over Marksman because, played well, it's a hell of a lot closer to BM and Surv than people give it credit. I joined a friend's raid 2 weeks ago as a BM hunter (they were short a dps and working on heroic kills) and they had another hunter, Marks spec. 529 ilevel, 522 weapon upgraded (Voice) 2/2 to 530.
On bosses he did incredible dps, was in the top 3 most fights and top 2 on Horridon. He didn't do as well on trash but Blizzard doesn't really balance around trash/AOE dps unless the disparity is just absurd (5.0/5.1 Surv vs. BM, for example). But on bosses? This guy blew sh** up. He actually takes pride in the fact that he does so well with what is currently the 'ewww' stigma'd spec of hunters.
Obviously that's one hunter in a sea of hundreds of thousands, but it proved to me that Marksmanship can perform when played well.