I think Dorico is on the verge of being the best option for notation composers looking for good mockups. Right now the simplicity of NotePerformer may still be more appealing to notation composers who are uncomfortable with MIDI programming, but soon, with a few well-constructed expression maps, the ability of Dorico to play well with the best sounding instrument libraries will put it over the top.
I am in the middle of switching my current workflow to load my orchestral template in Cubase, but control it with Dorico MIDI routing using virtual MIDI cables. I used to use Finale as the MIDI driver, but I think that time is over…!
As I continue to refine my expression maps, I will be able to apply them for all future pieces, until at some point I imagine my MIDI tweaking will be minimal and I’ll just be working in notation (as it is with NotePerformer)