This was the game that convinced me to buy the Queer Games Bundle. You had me with the description and the illustration of the wheelchair-using witch chilling with birds. It's an even better game than I imagined. I just finished the second session of what became a magical college campaign that I am running. I modified it to have a GM because my players weren't comfortable juggling both Characters and Aspects. Even with that, it is still challenging for players not used to gmless games, but very worthwhile. The level of detail for all the moving parts is just right. We love the world and characters we created together. It really is quite magical!
The main job has been exactly as you assumed. I helped set scenes outside of the aspects too and handled miscellaneous administrative tasks like illustrating the map and organizing all the choices the players made. Having too many good choices is the most common issue we've ran into, and that's a great thing!