In the original WoW Vanilla, there were two viable builds for Priest healers: Deep Holy and Deep Discipline. The Deep Holy build provided a +10% healing throughput, while the Deep Discipline build offered a +10% mana increase along with the spell Power Infusion, which aided in DPS. Players had the freedom to choose whichever playstyle they preferred.
For unknown reasons, TWoW reduced priest's healing coefficient by 20% and simultaneously boosted the Deep Holy build by 20%. While there were no changes for Deep Holy, the Deep Discipline build became unplayable. Additionally, Power Infusion was removed and replaced with a weaker passive buff called "Enlighten."
It is confusing why time is being wasted on altering gameplay for the worse. Please consider reverting the original healing coefficient, restoring the "Spiritual Healing" talent, and bringing back Power Infusion.
While TwoW is eliminating active spells, WoW Forever is introducing new ones, such as "Penance."