I’m up for this idea, too! 
It would be really great to have such integration.
Unfortunately so much things should be changed into both apps in order this integration to work as expected, as close as possible
to the way how the real bands and orchestras work.
I did long post about what is important to happen in Cubase in the following post:
ARA 2 Like option for MIDI it’ll be great in order the editing in Dorico to simultaneously appear in Cubase, and vice versa.
This will speed-up the overall workflow from composition to notation!
If Steinberg teams consider my suggestion… Well, probably this integration could be possible not earlier than version 11.5 of Cubase, and 4 - 4.X of Dorico.
I hope both teams behind Cubase and Dorico will hear us and will make this major step into the right direction!
Paper like scoring way must be deeply embraced, and multiple libraries into single Staff, or MIDI Track, too. /The need for MIDI Track Per Library patch should be preserved as optional/
For example: Most common practice for writing for String Section is to use 5 staves.
The integration of the Expression Maps in Overture allows you to load unlimited number of library patches (from different companies) per staff - for instance Violins 1 - you can use patches from Orchestral Tools, Spitfire Audion, Cinesamples, Cinematic Studio Strings, LASS, 8 Dio, Soundiron and all they can be used simultaneously, even with some small tricks you can combine different articulations from different libraries to play together.
Also there is a Direct Mapping… you can have full control per single expression map. In case you would like to preserve a particular articulation for real recording or performance, but you don’t like how it sounds with virtual instruments on a specific place in the score, so you can turn it off.
Overture doesn’t force you to waste time on creating pre-defined Expression Maps, and the to start scoring. You can create it even on fly while working on project and then to save it as User Preset. Both ways exist. Very flexible and comfortable. Isn’t it?
Greetings