Well in an effort to make sure this stays front page, you have to wonder if they are going to introduce more healers at now when consider the following,

So presumably speaking, if this follows the same trend and trends are something this team follows to a z, the next expansion will have a tank and a dps (most likely phys ranged to make it 4.) Then the next expansion would be healer and dps. However, it will be a pure healer or a shield healer? Either scenario would lead to at least 7 years of waiting for the other to get added assuming they follow the same pattern again and with the longer patches, one side of the healers won't be getting anything.