Blizzard have added Holy Paladin changes to tomorrow’s reset, joining the changes to the three Mage specs that got announced earlier. 

July 18 (Source)

Holy Paladin is overperforming in all content in Fractures of Time. We are targeting a global decrease of healing and damage as we are not looking to change preferred playstyles, but Tyr’s Deliverance will also be receiving additional adjustments as this talent in particular has been more effective than we would like.

Holy Paladins’ mana pools have been more plentiful than we would like in PvP. We’re targeting their base Mana regeneration to encourage player engagement with the variety of mana talents available.

Paladin

Holy

All healing decreased by 8%.

All damage decreased by 12%.

Tyr’s Deliverance healing decreased by 15%.

PvP

Holy Paladins now regenerate 60% less Mana in PvP combat (was 25%).

We intend to make the above changes with scheduled weekly maintenance, on Tuesday, July 18 in this region.