Soraka skillcap
Just some thoughts to add some more skillcap and fun to the new Soraka 
-Add stacks to Rejuvenate either increasing the duration or health/sec per champion hit. Of course the base duration or health/sec can be adjusted for balance.
-Give Wish the same synergy as Astral Infusion with the new Rejuvenate
This would promote Soraka to be in the fight more giving Starcall more use outside of poking the diving tank to keep the ADC up. Soraka's would have to decide is it a better option to risk the bigger Starcalls for those stronger heals. The synergy added to Wish would also provide Soraka some bigger plays, anticipating a dive top lane, queuing up some Rejuv stacks for the big counter play. Anyways, just some ideas throwing out there I think would make her more fun.