I'm assuming no sound/audio system either...
There actually is, it's one of the good things they added recently. You can add custom sounds to interactions and set them to play via timeline. I am pretty sure you can also set nodes from where the sound will come from, so making multiple different sound nodes and scattering them through the scene seems like the intended way to make complex ambiences happen.
They really just need to add the ability to make custom maps and add custom lighting to scenes and objects for the "scenario" part of things to be basically feature complete.
Sex only needs mouth oriented penetration and better cum mechanics.
But if I had to guess, they will keep pushing bug fixes and qol changes that, even if functional and welcome, are only padding for them to milk more patreon money. That and they will waste development time (and patreon money, inherently) making their OCs and publishing them in the cloud.
Worst part? The software is really good, the version we have is already miles better and less janky than most of the scenario builders / studio things out there.
When or IF this ever gets a completed release (and this 1.0 ain't it) I am willing to pay for this piece of software, but I don't judge it worth it right now.