when writing in a jazz context, the playback is so stiff one can barely tell what one wrote.
I would like to see “degrees of swing” option and the playback. This is basically triplasizing the playback.
it can also be implemented the other way around; midi notes that have been entered in real time that swing, can be straightened out for notation display.
Add a Swing text from the Tempo Palette. Then right-click it to open up "system text properties" which'll allow you to set swing ratio.
See aslo https://musescore.org/en/handbook/3/swing (still for v3)