Just like other modeling software, and even Archicad's biggest competitor, I really miss being able to work with multiple windows—floor plan, section, and 3D—open simultaneously, updating in real-time as changes are made.
It's frustrating that I can only undock the window and position it within the Archicad environment. For project development teams, it disrupts the workflow to have to click on another window and wait for it to update just to see a simple change you made in another window.