Look at the level 90 talents for Paladin, Priest, Druid, Monk..
They have either talents that change to fit the spec, or.. they have spells that can be used both on dealing damage to enemy, and healing, depending on target, etc.
Even in Warlords of Draenor, some of these abilities cut their damage away, just healing.
But for Shaman, no change at all.
Restoration will keep Elemental Blast as a talent choice for healing (damage spell?) such a poor choice, seriously.
At least let us chose to use it on enemy or friendly target and give it healing, so it works like Chi Bounce!