A big concern I have of Convoke Spirits as a Balance Druid is that Starfall doesn’t stack so if we were to get multiple casts of Starfall all it would do is refresh the duration and waste the spell.
Which brings me to my other point, a lot of people in the Balance Druid community feel that our AoE ability is lacking. Other classes get spenders they can use to boost the damage of their AoE. Balance Druids push the Starfall button which costs 50 AP and don’t cast it again until it ends because there’s no benefit to doing so and if we want to keep making use of our AP we have to cast Starsurge which feels bad having to cast during AoE situations.
Making Starfall stackable would solve both of these problems. Another solution might be that casting Starfall a second time refreshes the duration but also increases its damage by 25% with a maximum of 50%.