“Contemporary informed performance” isn’t one of my strengths, but as a performer, I’m having trouble understanding how this would work.
Behind Bars is of course “The Faber Style Guide”, and it goes without saying that other houses have other styles. I agree that the main problem of music notation software is the balance between “automatic helping” and “actually that’s not helping”. Adobe Illustrator gives you the greatest flexibility for notation, but provides no help either. 
Perhaps Dorico could have different modes of notation assumptions: “Renaissance”, “Baroque”, “Classical”, “2nd Viennese”, “Avant garde”, etc…?