There have been no improvements to stealth in the course of EA. All our hopes need to be pinned on the full release!
Not that I personally mind visible vision cones, given the difficulty of assessing where a smallish sprite is looking. I just think they should have a wider angle and be supplemented by 360 perception/hearing circles closer to the character, and a bunch of other stuff related to stealth and ambush should be tweaked.
"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"
