For now the more urgent issue is redefining the talent placement. But instead of saying "oh lvl 100 row is trash" we should think what exactly should that row be focused on: utility or personal performance.
This I think is the core issue. Once we identify/compromise with devs which row is responsible for what then I think we can start seeing some actual improvements to talent themselves.
Let's say lvl75 is personal performance, move SoL to that tier instead of Equality. Then you have a passive TV enhancer when you want to stick to sustained finisher damage as main source of holy power consumer. Burst? Go SoL. AoE? Here's Mass Judgment for you.
lvl90 is the survivability tier: Divine Intervention brings us back to 20% and applies Divine Shield, the cooldown on Divine Shield is refreshed to full duration if it was used before. Make Divine Steed baseline and instead of that put Eye for an Eye in this place. Blaze of Light stays the same.
lvl100 THE UTILITY: SOME NEW TALENT in place of Holy Wrath (more on HW later).
Equality (now Reckoning) - 2 min cd raid cooldown - lasts X seconds after which it explodes dealing damage to all enemies in Y radius based on % of the damage the entire raid received during that time.
Word of Glory stays the same.