I’m very happy with the way Dorico 2 manage additional staves and ossias.
It makes my life so much easier!
But I found that it’s not fully optimized for multiple instruments players.
For example, a clarinet part with both a B flat clarinet and a Bass Clarinet, can’t have an additional stave without making a mess on the part.
Ossias on the other hand work just fine with multiple instrument players.
Here, you can download the file I created to show this issue.
Thanks for everything!