Idea for soraka change.
Passive: soraka heals nearby allies for 30% of her health regen per 5 seconds Q: star fall 8 second cd a meteor falls dealing damage and slowing W: heal. 15 sec cd Soraka heals an ally. This ally is affected with a debuff reducing any healing from soraka by 25% per heal. This damages soraka E: cosmic wall: soraka makes a wall out of light increasing healing of allies that pass through it and slowing and damaging enemies that pass through it. R: raid wide heal
has an escape in her E. Also, her Q doesn't regen any health anyhow if she doesn't have a point in her W so there's no use in altering it. Maybe they can create a max amount you can regen from her Q, that increases by Rank?
W shouldn't have a heal debuff, we already have plenty of sources of Grievous Wounds (which they made 50% reduced healing, from 40%)...taking 25 extra from that makes Soraka unplayable as a Support unless you take away the self-damage and even then that's pushing it.
Her E is pretty balanced, and it's fairly easy to escape unless the ADC can prohibit movement (-coughMissFortunecough-). Perhaps they can slightly reduce its scale, or maybe exchange the Root for a Slow instead.