I've got an idea for a future concept but making a change as you requested to the current DWC version is not trivial.
The web interface provides basically everything that a user may wants to do on a tablet, so I am reluctant to cut off functionality depending on the screen size even if that might simplify things for you. The UI is already responsive so it is already more or less touch-screen optimised.
Once the layout and functionality of the web interface can be modified as needed you can achieve what you have in mind, but it will take a while longer before we get to this stage.