Personally I don't care what WotC clarifies or doesn't, what it re-words or re-writes. The intent of stealth in my game is clear-cut and defined. It is not some method for PC's (or NPC's, or Monsters) to appear and disappear around the battlefield like Nightcrawler in X-Men 2.
And I am now done with reading Stealth threads.
How did you find the stealth thread in the first place.
Were you in combat?
Did it have any cover or concealment, I think it would with all the other threads out there.
Were you distracted at all? Mnnn beeer.
Is your passive perception that high?
Personally I like stealth in combat, I think fighting someone is enough of a distraction to justify someone hiding and sneaking up on you. Once spotted, some kind of significant distraction would have to happen to get them to be able to re-hide.
I've ruled that crits form other sources are a big enough distraction, and any time they get actual cover and concealment they are not instantly refound once they leave the cover but there enemies have a bonus to there passive perception due to them ebing aware of the stealth guy being out there.
I don't really care what the official rule ends up being, I just find it lame in the extreme that people can't sneak up on people in combat without cover or concealment.