Hello!
Thank you for your kind words.
It is definitely feasible via messages to flowcharts (i.e., tags in Ink automatically translated into Fungus messages by the Gateway), but I get your point. We might include a special syntax to handle the stage controls, like we do for dialogs, characters and portraits. My only concern is that the amount of parameters could be overwhelming.
If you had a magic wand, what kind of syntax would you like to see implemented? Can you write a sort of documentation of this potential new feature?