There are already some competent scoring programs. The only missing thing is more integration of VSL with some of them, like expression maps for Dorico. And, I would add, support for basic and missing tools, like tuning and pitch variations, at the basis of the most successful contemporary music at least from Xenakis and Penderecki.
Is there room for another program, in addition to Finale, Sibelius, Dorico, or the smaller Notion and MuseScore or the nerdy LilyPond, all actively developed? Would a Vienna Score program give something more?
Paolo