Not disc specific, but still benefits disc. I'd like mastery to add half of its effectiveness into damage (I have 50% mastery as disc, so I'd do 25% extra damage) for all healers. Would make it a more useful stat for general use as disc and for other healers just increase open world damage because right now the only thing that does that is artifact traits and gear.
More disc specific stuff;
-add holy nova of mind sear back for aoe - uncapped for damage but for atonement only has effect on 3 targets(so if you're damaging 5 dudes only damage on 3 of them turns into heals)
-divine star and halo also applies atonement to 5 targets.
-atonement base duration increased to 20sec
-contrition talent removed. Replaced with "divine burst: bursts the atonements you have up dealing x amount of healing to all targets who had atonement(and all targets in a 5yd radius from atonemented targets) increased by 5% per atonement. 1.5 sec cast time. 1.5min cd"
-twist of fate procs off damage
-lights wrath deals 50% more damage outside of raids.
-power word: radiance mana cost reduced.
-pw:s absorb increased by ~50%
-damage trinkets no longer deal greatly reduced damage but only 30% of their damage done is converted to atonement healing.
-sins of the many artifact trait has increased effectiveness outside of raids and pvp(prob. about 50% is good. Another 5% in 5 mans feels kinda shit)
Some of these may be deemed op. But I think these would improve the spec or be qol things.