Dear SE: Your real mistake this weekend...

[Floortank]

You're right, they didn't. It was ASSUMED that after 4 years we were due something new. So the next time we MIGHT get a chance it will officially be 6 years. 6 YEARS since the last healer job. Ridiculous, there are no words.

Oh my goodness, Astrologian dropped in 2015. WOW hasn't had a new healer since 2012, and won't get another for the foreseeable future and it's not a big deal. Healers are the hardest kind of class to add to an MMO. It is hard to make a high quality healer that feels different from every other healer. Every healing spec in WOW is essentially the exact same thing except for Discipline Priest, which does damage to heal. It's harder than you think, and time and time again, the SE development team has refused to crap out some factory response to player demand. The lack of a healer means they take your desire incredibly seriously, because they want to make you happy. Not just dump out some crappy healer you won't be happy with.

Yoshi P straight up said as much when asked last night. "Healers are difficult to balance, so I would like to balance the existing jobs in 5.0 instead of adding new ones."

That includes balance changes to the current healers. Along with the battle system, the changes may significantly alter the way they're played, or spice them up into new and more enticing forms, giving you something to achieve while you enjoy the new content. There are 17 jobs, if you demand to only play one kind of job then you are destined to wait longer than people who enjoy and are thankful for every opportunity to play the game. Be reasonable.