Hello, I've been using this script myself for a while when doing 2D animation with the latest Blender and works great.
However, I propose a small change. Under "3D View" I switched off the "Rotate" keybind that was bound to "Middle Mouse".

Otherwise pressing middle mouse by accident would tilt the view into 3D perspective and that could be annoying, especially from people coming from different 2D software backgrounds where pressing Middle Mouse alone is panning.