FlowerPower - I totally agree with you that the process you describe here would be easier if it all could be done in one application. And I almost take it as granted that most of these functions are on Steinbergs roadmap for Dorico (I think real-time midi recording, automation lanes and expanded expression maps are already confirmed for the future).
However - when it comes to audio based DAW functions, such as multi track recording, time- and pitch stretching, loop based playback (ableton), and so on, the scope might be too big for one app.