the image is fake, the duscussion on 4th spec and even tinker class is not imo. Both are perfectly viable options I'd say. Maybe blizzard finally figured out it is -impossible- to perfectly balance classes wether it is for pve or pvp even with the current line up. And just went "fuck it, we'll just swamp them with specs so they can't figure out exactly how things are unbalanced" .
For real though, considering it's there anniversary and the way specs currently work it preyy viable imo. And they no longer have to balance an insane amount of talent points. Just skills, talents are available to all specs. Skills are bloated anyway so some could be used to create new specs with some tweaks and supported by new skills.