I was thinking that a way to improve holy priest utility in raids and even in M+ is to build on the concepts of Divine Hymn into Symbol of Hope.
Symbol of Hope should be buffed to 17% imo or even 22% mana returned so people actually notice. Make it also reduces the cost of healer’s healing spells to 10%-15% less mana for 15 seconds with the stacking mechanic of Divine Hymn so if you channel it fully you get 15 seconds of 10-15% cheaper healing spells for healers. This gives Holy Priest a cool class flavor with their two channeled spells. I don’t think this is OP because it has a 5 MINUTE COOLDOWN!
FIVE WHOLE MINUTES for a measly 12% mana at the moment which no one cares or notices? It’s longer than all the more powerful disc cooldowns and paladin cooldowns in fact its probably longer then most cooldowns that all other classes have. It just doesn’t feel like it has the impact it should of a 5 minute cooldown.