notation software that makes sense
It seems all notation software have an identity crisis. They don’t know if they should be audio processors, sheet music typesetters, or MIDI players. None of the above are particularly useful for composition, which, like photo-editing (a la Photoshop), movie-making (a la Premiere), essay-writing (a la Word), is a non-linear exercise. A non-linear editing metaphor along with some machine intelligence to actually help the process rather than hinder it, is needed. It doesn’t need to be fancy with BS features like VST and these silly knobs for making effects. But it needs to get the basics working well.
A vague and incomplete sketch of what this may look like… self-explanatory: