Hello,
at the moment, the default playback of Dorico is much more sterile than the default playback of Sibelius. Probably, because there is no interpretation engine, yet. Are any improvements planned for this?
The options on the Dynamics page of Play > Playback Options show the beginnings of these sorts of features, with initial support for slight stresses on the beat, but we do plan to build on this as the application matures, as well as providing tools for editing the MIDI data directly so that you can get exactly the performance you require.
Option for tweaking are very good. However, it is also important that the default playback is not sterile, as this reduces the tweaking work a lot.