Aleatoric and modern techniques

Quite happy with how musescore functions in terms of notating aleatoric techniques (like box notation) at the moment; the workarounds are fairly easy and overall better than the other platforms. Just hoping there would be ways to:
- Add caps to wiggly lines/alter speeds of wiggly lines over time
- Do multiple time signatures at once? I have done 12/8 against 3/2 before, but unequal bar lengths are still impossible right now.
- Playback for feathered beaming?
- Real box notation and coordination lines would be nice, though I've found workarounds as I said

These are just really small things, but it's worth mentioning that musescore is by far my favourite app for notation of all time. I have trialled both Dorico and Sibelius (I'm a composition major) and neither of them are as versatile or easy to use as this!