I don’t speak as a developer, but getting all these effects in the upcoming effects will be extremely hard, if not impossible. While I am sure we will eventually get them, I think we have to wait for some time. All we can do is reinforce our request but also try all we can with our tools.
For me, even small additions like these proposals ([Help request/feature] - Cylindrical shell explosions - [Feature request] Non-Inherit velocity toggle for SoS - Request: Slider for height inaccuracy - Is it possible to make a shell of shells explode vertically?), would make a big difference. Of course, we all want ghost shells - and I use some premade ones where I need them - but I think the “Phase” feature in the current beta update is the starting point for them. We have to see. Of course, more shell shapes and/or instructions on how to make them would be a huge game-changer. Imagine having the possibility to add your own algorithm to make, for example, these happozaki shells without relying on crossettes or speed variations! Or even more to make the inaccurate spheres we often see in real fireworks (not the ones with speed variations, but rather when a shell explodes more elliptically than a sphere).
I hope for the best! And who knows, maybe the developers have some surprises for us.