When opening a file you are thrown into a Model as per saved settings in the file. But often you want another file. And you have to wait for the first Model to open, then open Models dialog and find your desired Model. I want the File Open to show me the Models dialog and letting me select a Model to open before opening the default Model.
There is the command line option '-m' to explicitly open a Model, but you are right, there should be a dialog option to choose a Model.