Lore
Just to help clarify, on top of what Rygarius said: These changes were made because the items were under budget and not giving the appropriate amount of stats for their item level. There was a bug, so we fixed it.
This was not a change made to make healers more interested in Spirit trinkets. We recognize that Spirit isn't the most appealing stat for healers at the moment, and are discussing how we want to handle that, but that's a separate issue than the one that prompted the changes to these trinkets.