The reason why i wrote about it here is that enemies don't realy wants to search for player as they usually do when player just go sneak. Solution is pretty simple as i can see. Just cancel invisiblility right before player use sneaking so that the enemies starts searching for player and not just standing still as the do now.
That's pretty silly and ridiculous. Sneak does not need another nerf to make it even more cripplingly useless.