Regarding acciaccaturas/arpeggiated chords/etc. now playback has a new engine

Would it now potentially be possible to have such things start before the beat, as opposed to starting ON the beat? I find that these things starting before the beat tend to be more common in general (in classical music at least) – in the past I'd usually fix this (if I could be bothered lol) with the piano roll in MuseScore 3 since there'd basically never be a time they'd be starting on the beat instead of before the beat.

If the new system is looking ahead as opposed to only reacting to immediate instructions, does that mean something like this could be more feasible?

Also for that matter, would it be possible to support arpeggiated chords that run across both staves for things like harp and piano? Especially since I used to be able to fake this visually by connecting the two arpeggiation lines (or whatever you call them) manually, but now in MuseScore 4 it automatically widens the staves to separate them when exported or reloaded!

Maybe these things have already been considered!!! Sorry if so!!!