I guess that after the software gets to a good point on the creation of more professional version features - remember that FWsim after all IS a professional fireworks show designer! - there might be a focus on adding more realistic features (both for the sake of enthusiasts and professionals). On these threads, I published a list of elements that would help create a real stutata.
[Feature request] Non-Inherit velocity toggle for SoS - #8 by Mangmod Non-Inherit velocity for shell of shells (So they don’t look like they are falling immediately)
Cylindrical Shell Explosions (Which is how a stutata is formed, with many sub-cylindrical shells)
I hope it helps!