A few days ago Blizzard got Shamans all excited over the proposed change that Healing Tide was going to be baseline for all Shamans, instead of being a talent that Shamans needed to spec into. This is now official in the new patch notes.
Not only is Healing Tide being made into a baseline spell, it is also getting significantly buffed for 25M raiding, similar to how we saw Revival, Tranq etc buffed previously. It will now heal up to 12 raid members in 25M, up from the previous five.
Healing Tide Totem is no longer a talent and is a baseline ability for all Shamans. Additionally, this totem will now heal 12 raid members (up from 5) when used in a 25-player instance.
This is a great change, because shamans will no longer have to automatically select Healing Tide as the talent for that tier for most fights.